Clean up tests

138 files changed, 138 insertions, 138 deletions

diff --git a/tests/app/Module/AustrianHistoricEventsTest.php b/tests/app/Module/AustrianHistoricEventsTest.php
index 22b5674bcc..56fe149be8 100644
--- a/tests/app/Module/AustrianHistoricEventsTest.php
+++ b/tests/app/Module/AustrianHistoricEventsTest.php
@@ -27,6 +27,6 @@ class AustrianHistoricEventsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(AustrianHistoricEvents::class));
+        self::assertTrue(class_exists(AustrianHistoricEvents::class));
     }
 }
diff --git a/tests/app/Module/AustrianPresidentsTest.php b/tests/app/Module/AustrianPresidentsTest.php
index c8aa6f69d7..d6f44ec107 100644
--- a/tests/app/Module/AustrianPresidentsTest.php
+++ b/tests/app/Module/AustrianPresidentsTest.php
@@ -27,6 +27,6 @@ class AustrianPresidentsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(AustrianPresidents::class));
+        self::assertTrue(class_exists(AustrianPresidents::class));
     }
 }
diff --git a/tests/app/Module/BingMapsTest.php b/tests/app/Module/BingMapsTest.php
index e6555f0325..ddb04db4bb 100644
--- a/tests/app/Module/BingMapsTest.php
+++ b/tests/app/Module/BingMapsTest.php
@@ -27,6 +27,6 @@ class BingMapsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(BingMaps::class));
+        self::assertTrue(class_exists(BingMaps::class));
     }
 }
diff --git a/tests/app/Module/BingWebmasterToolsModuleTest.php b/tests/app/Module/BingWebmasterToolsModuleTest.php
index 6e530334d0..48c5fc3aac 100644
--- a/tests/app/Module/BingWebmasterToolsModuleTest.php
+++ b/tests/app/Module/BingWebmasterToolsModuleTest.php
@@ -27,6 +27,6 @@ class BingWebmasterToolsModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(BingWebmasterToolsModule::class));
+        self::assertTrue(class_exists(BingWebmasterToolsModule::class));
     }
 }
diff --git a/tests/app/Module/BranchesListModuleTest.php b/tests/app/Module/BranchesListModuleTest.php
index 4f0d5549f2..20cd2c1590 100644
--- a/tests/app/Module/BranchesListModuleTest.php
+++ b/tests/app/Module/BranchesListModuleTest.php
@@ -27,6 +27,6 @@ class BranchesListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(BranchesListModule::class));
+        self::assertTrue(class_exists(BranchesListModule::class));
     }
 }
diff --git a/tests/app/Module/BritishMonarchsTest.php b/tests/app/Module/BritishMonarchsTest.php
index 4672b4057a..582c05eaf7 100644
--- a/tests/app/Module/BritishMonarchsTest.php
+++ b/tests/app/Module/BritishMonarchsTest.php
@@ -27,6 +27,6 @@ class BritishMonarchsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(BritishMonarchs::class));
+        self::assertTrue(class_exists(BritishMonarchs::class));
     }
 }
diff --git a/tests/app/Module/BritishPrimeMinistersTest.php b/tests/app/Module/BritishPrimeMinistersTest.php
index eb5312774e..f62629ae0d 100644
--- a/tests/app/Module/BritishPrimeMinistersTest.php
+++ b/tests/app/Module/BritishPrimeMinistersTest.php
@@ -27,6 +27,6 @@ class BritishPrimeMinistersTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(BritishPrimeMinisters::class));
+        self::assertTrue(class_exists(BritishPrimeMinisters::class));
     }
 }
diff --git a/tests/app/Module/BritishSocialHistoryTest.php b/tests/app/Module/BritishSocialHistoryTest.php
index 68d2384f9b..5ef7b8b41a 100644
--- a/tests/app/Module/BritishSocialHistoryTest.php
+++ b/tests/app/Module/BritishSocialHistoryTest.php
@@ -27,6 +27,6 @@ class BritishSocialHistoryTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(BritishSocialHistory::class));
+        self::assertTrue(class_exists(BritishSocialHistory::class));
     }
 }
diff --git a/tests/app/Module/CalendarMenuModuleTest.php b/tests/app/Module/CalendarMenuModuleTest.php
index 6b02ac4a1e..33a51cfd3b 100644
--- a/tests/app/Module/CalendarMenuModuleTest.php
+++ b/tests/app/Module/CalendarMenuModuleTest.php
@@ -27,6 +27,6 @@ class CalendarMenuModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(CalendarMenuModule::class));
+        self::assertTrue(class_exists(CalendarMenuModule::class));
     }
 }
diff --git a/tests/app/Module/ChartsMenuModuleTest.php b/tests/app/Module/ChartsMenuModuleTest.php
index 98ee21496a..45841f7644 100644
--- a/tests/app/Module/ChartsMenuModuleTest.php
+++ b/tests/app/Module/ChartsMenuModuleTest.php
@@ -27,6 +27,6 @@ class ChartsMenuModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(ChartsMenuModule::class));
+        self::assertTrue(class_exists(ChartsMenuModule::class));
     }
 }
diff --git a/tests/app/Module/CheckForNewVersionTest.php b/tests/app/Module/CheckForNewVersionTest.php
index f890048367..b4dc75b442 100644
--- a/tests/app/Module/CheckForNewVersionTest.php
+++ b/tests/app/Module/CheckForNewVersionTest.php
@@ -27,6 +27,6 @@ class CheckForNewVersionTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(CheckForNewVersion::class));
+        self::assertTrue(class_exists(CheckForNewVersion::class));
     }
 }
diff --git a/tests/app/Module/CloudsThemeTest.php b/tests/app/Module/CloudsThemeTest.php
index 9bbdd1a29c..032d769ef1 100644
--- a/tests/app/Module/CloudsThemeTest.php
+++ b/tests/app/Module/CloudsThemeTest.php
@@ -27,6 +27,6 @@ class CloudsThemeTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(CloudsTheme::class));
+        self::assertTrue(class_exists(CloudsTheme::class));
     }
 }
diff --git a/tests/app/Module/ColorsThemeTest.php b/tests/app/Module/ColorsThemeTest.php
index 86f46111db..f7cc871e48 100644
--- a/tests/app/Module/ColorsThemeTest.php
+++ b/tests/app/Module/ColorsThemeTest.php
@@ -27,6 +27,6 @@ class ColorsThemeTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(ColorsTheme::class));
+        self::assertTrue(class_exists(ColorsTheme::class));
     }
 }
diff --git a/tests/app/Module/ContactsFooterModuleTest.php b/tests/app/Module/ContactsFooterModuleTest.php
index 0ac436a6ad..d21b67185d 100644
--- a/tests/app/Module/ContactsFooterModuleTest.php
+++ b/tests/app/Module/ContactsFooterModuleTest.php
@@ -27,6 +27,6 @@ class ContactsFooterModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(ContactsFooterModule::class));
+        self::assertTrue(class_exists(ContactsFooterModule::class));
     }
 }
diff --git a/tests/app/Module/CustomCssJsModuleTest.php b/tests/app/Module/CustomCssJsModuleTest.php
index 9792c0fa1d..3af083e835 100644
--- a/tests/app/Module/CustomCssJsModuleTest.php
+++ b/tests/app/Module/CustomCssJsModuleTest.php
@@ -27,6 +27,6 @@ class CustomCssJsModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(CustomCssJsModule::class));
+        self::assertTrue(class_exists(CustomCssJsModule::class));
     }
 }
diff --git a/tests/app/Module/CzechMonarchsAndPresidentsTest.php b/tests/app/Module/CzechMonarchsAndPresidentsTest.php
index c05c72c6f2..62c918e881 100644
--- a/tests/app/Module/CzechMonarchsAndPresidentsTest.php
+++ b/tests/app/Module/CzechMonarchsAndPresidentsTest.php
@@ -27,6 +27,6 @@ class CzechMonarchsAndPresidentsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(CzechMonarchsAndPresidents::class));
+        self::assertTrue(class_exists(CzechMonarchsAndPresidents::class));
     }
 }
diff --git a/tests/app/Module/DutchMonarchsTest.php b/tests/app/Module/DutchMonarchsTest.php
index ca3b827226..3123a83105 100644
--- a/tests/app/Module/DutchMonarchsTest.php
+++ b/tests/app/Module/DutchMonarchsTest.php
@@ -27,6 +27,6 @@ class DutchMonarchsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(DutchMonarchs::class));
+        self::assertTrue(class_exists(DutchMonarchs::class));
     }
 }
diff --git a/tests/app/Module/DutchPrimeMinistersTest.php b/tests/app/Module/DutchPrimeMinistersTest.php
index 8129d1fa42..86a5879cfc 100644
--- a/tests/app/Module/DutchPrimeMinistersTest.php
+++ b/tests/app/Module/DutchPrimeMinistersTest.php
@@ -27,6 +27,6 @@ class DutchPrimeMinistersTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(DutchPrimeMinisters::class));
+        self::assertTrue(class_exists(DutchPrimeMinisters::class));
     }
 }
diff --git a/tests/app/Module/EsriMapsTest.php b/tests/app/Module/EsriMapsTest.php
index cd57b8d0ee..dcff6f5622 100644
--- a/tests/app/Module/EsriMapsTest.php
+++ b/tests/app/Module/EsriMapsTest.php
@@ -27,6 +27,6 @@ class EsriMapsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(EsriMaps::class));
+        self::assertTrue(class_exists(EsriMaps::class));
     }
 }
diff --git a/tests/app/Module/FabThemeTest.php b/tests/app/Module/FabThemeTest.php
index d46b3904dd..4bee0dcbbd 100644
--- a/tests/app/Module/FabThemeTest.php
+++ b/tests/app/Module/FabThemeTest.php
@@ -27,6 +27,6 @@ class FabThemeTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FabTheme::class));
+        self::assertTrue(class_exists(FabTheme::class));
     }
 }
diff --git a/tests/app/Module/FamilyListModuleTest.php b/tests/app/Module/FamilyListModuleTest.php
index eaa54c8102..1556a98d1c 100644
--- a/tests/app/Module/FamilyListModuleTest.php
+++ b/tests/app/Module/FamilyListModuleTest.php
@@ -27,6 +27,6 @@ class FamilyListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FamilyListModule::class));
+        self::assertTrue(class_exists(FamilyListModule::class));
     }
 }
diff --git a/tests/app/Module/FixCemeteryTagTest.php b/tests/app/Module/FixCemeteryTagTest.php
index c5cbe70840..abfaa82a82 100644
--- a/tests/app/Module/FixCemeteryTagTest.php
+++ b/tests/app/Module/FixCemeteryTagTest.php
@@ -27,6 +27,6 @@ class FixCemeteryTagTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FixCemeteryTag::class));
+        self::assertTrue(class_exists(FixCemeteryTag::class));
     }
 }
diff --git a/tests/app/Module/FixMissingDeathsTest.php b/tests/app/Module/FixMissingDeathsTest.php
index cdeb9c16ed..4c3e552606 100644
--- a/tests/app/Module/FixMissingDeathsTest.php
+++ b/tests/app/Module/FixMissingDeathsTest.php
@@ -27,6 +27,6 @@ class FixMissingDeathsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FixMissingDeaths::class));
+        self::assertTrue(class_exists(FixMissingDeaths::class));
     }
 }
diff --git a/tests/app/Module/FixNameSlashesAndSpacesTest.php b/tests/app/Module/FixNameSlashesAndSpacesTest.php
index b411aaa22f..bd2c4ee7e2 100644
--- a/tests/app/Module/FixNameSlashesAndSpacesTest.php
+++ b/tests/app/Module/FixNameSlashesAndSpacesTest.php
@@ -27,6 +27,6 @@ class FixNameSlashesAndSpacesTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FixNameSlashesAndSpaces::class));
+        self::assertTrue(class_exists(FixNameSlashesAndSpaces::class));
     }
 }
diff --git a/tests/app/Module/FixNameTagsTest.php b/tests/app/Module/FixNameTagsTest.php
index ecae5dd55f..dec8684a39 100644
--- a/tests/app/Module/FixNameTagsTest.php
+++ b/tests/app/Module/FixNameTagsTest.php
@@ -27,6 +27,6 @@ class FixNameTagsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FixNameTags::class));
+        self::assertTrue(class_exists(FixNameTags::class));
     }
 }
diff --git a/tests/app/Module/FixPlaceNamesTest.php b/tests/app/Module/FixPlaceNamesTest.php
index c23fbdc8be..731c3bb259 100644
--- a/tests/app/Module/FixPlaceNamesTest.php
+++ b/tests/app/Module/FixPlaceNamesTest.php
@@ -27,6 +27,6 @@ class FixPlaceNamesTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FixPlaceNames::class));
+        self::assertTrue(class_exists(FixPlaceNames::class));
     }
 }
diff --git a/tests/app/Module/FixPrimaryTagTest.php b/tests/app/Module/FixPrimaryTagTest.php
index 0cefa54fbf..32f66d8a76 100644
--- a/tests/app/Module/FixPrimaryTagTest.php
+++ b/tests/app/Module/FixPrimaryTagTest.php
@@ -27,6 +27,6 @@ class FixPrimaryTagTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FixPrimaryTag::class));
+        self::assertTrue(class_exists(FixPrimaryTag::class));
     }
 }
diff --git a/tests/app/Module/FixSearchAndReplaceTest.php b/tests/app/Module/FixSearchAndReplaceTest.php
index 0b56409109..ef8b3ac2cb 100644
--- a/tests/app/Module/FixSearchAndReplaceTest.php
+++ b/tests/app/Module/FixSearchAndReplaceTest.php
@@ -27,6 +27,6 @@ class FixSearchAndReplaceTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FixSearchAndReplace::class));
+        self::assertTrue(class_exists(FixSearchAndReplace::class));
     }
 }
diff --git a/tests/app/Module/FixWtObjeSortTagTest.php b/tests/app/Module/FixWtObjeSortTagTest.php
index d8635e6d12..799a91a521 100644
--- a/tests/app/Module/FixWtObjeSortTagTest.php
+++ b/tests/app/Module/FixWtObjeSortTagTest.php
@@ -27,6 +27,6 @@ class FixWtObjeSortTagTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FixWtObjeSortTag::class));
+        self::assertTrue(class_exists(FixWtObjeSortTag::class));
     }
 }
diff --git a/tests/app/Module/FrenchHistoryTest.php b/tests/app/Module/FrenchHistoryTest.php
index 9095c89c2f..bca273d97a 100644
--- a/tests/app/Module/FrenchHistoryTest.php
+++ b/tests/app/Module/FrenchHistoryTest.php
@@ -27,6 +27,6 @@ class FrenchHistoryTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(FrenchHistory::class));
+        self::assertTrue(class_exists(FrenchHistory::class));
     }
 }
diff --git a/tests/app/Module/GeonamesAutocompleteTest.php b/tests/app/Module/GeonamesAutocompleteTest.php
index f3c35aaaca..2b5fa582ed 100644
--- a/tests/app/Module/GeonamesAutocompleteTest.php
+++ b/tests/app/Module/GeonamesAutocompleteTest.php
@@ -27,6 +27,6 @@ class GeonamesAutocompleteTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(GeonamesAutocomplete::class));
+        self::assertTrue(class_exists(GeonamesAutocomplete::class));
     }
 }
diff --git a/tests/app/Module/GoogleAnalyticsModuleTest.php b/tests/app/Module/GoogleAnalyticsModuleTest.php
index 1f92d751a2..a1a3d4b40b 100644
--- a/tests/app/Module/GoogleAnalyticsModuleTest.php
+++ b/tests/app/Module/GoogleAnalyticsModuleTest.php
@@ -27,6 +27,6 @@ class GoogleAnalyticsModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(GoogleAnalyticsModule::class));
+        self::assertTrue(class_exists(GoogleAnalyticsModule::class));
     }
 }
diff --git a/tests/app/Module/GoogleMapsTest.php b/tests/app/Module/GoogleMapsTest.php
index e77c1572b7..0036b97ac4 100644
--- a/tests/app/Module/GoogleMapsTest.php
+++ b/tests/app/Module/GoogleMapsTest.php
@@ -27,6 +27,6 @@ class GoogleMapsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(GoogleMaps::class));
+        self::assertTrue(class_exists(GoogleMaps::class));
     }
 }
diff --git a/tests/app/Module/GoogleWebmasterToolsModuleTest.php b/tests/app/Module/GoogleWebmasterToolsModuleTest.php
index 65cf1613a9..ea3b820339 100644
--- a/tests/app/Module/GoogleWebmasterToolsModuleTest.php
+++ b/tests/app/Module/GoogleWebmasterToolsModuleTest.php
@@ -27,6 +27,6 @@ class GoogleWebmasterToolsModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(GoogleWebmasterToolsModule::class));
+        self::assertTrue(class_exists(GoogleWebmasterToolsModule::class));
     }
 }
diff --git a/tests/app/Module/HereMapsTest.php b/tests/app/Module/HereMapsTest.php
index 9eaf8bdf70..ee8de37efc 100644
--- a/tests/app/Module/HereMapsTest.php
+++ b/tests/app/Module/HereMapsTest.php
@@ -27,6 +27,6 @@ class HereMapsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(HereMaps::class));
+        self::assertTrue(class_exists(HereMaps::class));
     }
 }
diff --git a/tests/app/Module/HitCountFooterModuleTest.php b/tests/app/Module/HitCountFooterModuleTest.php
index e46495cfd9..0ba645f16b 100644
--- a/tests/app/Module/HitCountFooterModuleTest.php
+++ b/tests/app/Module/HitCountFooterModuleTest.php
@@ -27,6 +27,6 @@ class HitCountFooterModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(HitCountFooterModule::class));
+        self::assertTrue(class_exists(HitCountFooterModule::class));
     }
 }
diff --git a/tests/app/Module/IndividualListModuleTest.php b/tests/app/Module/IndividualListModuleTest.php
index facb57aea0..35917c3c75 100644
--- a/tests/app/Module/IndividualListModuleTest.php
+++ b/tests/app/Module/IndividualListModuleTest.php
@@ -27,6 +27,6 @@ class IndividualListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(IndividualListModule::class));
+        self::assertTrue(class_exists(IndividualListModule::class));
     }
 }
diff --git a/tests/app/Module/LanguageAfrikaansTest.php b/tests/app/Module/LanguageAfrikaansTest.php
index 5414294cd4..eb50260555 100644
--- a/tests/app/Module/LanguageAfrikaansTest.php
+++ b/tests/app/Module/LanguageAfrikaansTest.php
@@ -27,6 +27,6 @@ class LanguageAfrikaansTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageAfrikaans::class));
+        self::assertTrue(class_exists(LanguageAfrikaans::class));
     }
 }
diff --git a/tests/app/Module/LanguageAlbanianTest.php b/tests/app/Module/LanguageAlbanianTest.php
index c8fc541bfb..d733e58c92 100644
--- a/tests/app/Module/LanguageAlbanianTest.php
+++ b/tests/app/Module/LanguageAlbanianTest.php
@@ -27,6 +27,6 @@ class LanguageAlbanianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageAlbanian::class));
+        self::assertTrue(class_exists(LanguageAlbanian::class));
     }
 }
diff --git a/tests/app/Module/LanguageArabicTest.php b/tests/app/Module/LanguageArabicTest.php
index c6b4a9f118..515a293bb7 100644
--- a/tests/app/Module/LanguageArabicTest.php
+++ b/tests/app/Module/LanguageArabicTest.php
@@ -27,6 +27,6 @@ class LanguageArabicTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageArabic::class));
+        self::assertTrue(class_exists(LanguageArabic::class));
     }
 }
diff --git a/tests/app/Module/LanguageBosnianTest.php b/tests/app/Module/LanguageBosnianTest.php
index ecd675bf19..8aa05ea119 100644
--- a/tests/app/Module/LanguageBosnianTest.php
+++ b/tests/app/Module/LanguageBosnianTest.php
@@ -27,6 +27,6 @@ class LanguageBosnianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageBosnian::class));
+        self::assertTrue(class_exists(LanguageBosnian::class));
     }
 }
diff --git a/tests/app/Module/LanguageBulgarianTest.php b/tests/app/Module/LanguageBulgarianTest.php
index ec934029ff..79d2f0d402 100644
--- a/tests/app/Module/LanguageBulgarianTest.php
+++ b/tests/app/Module/LanguageBulgarianTest.php
@@ -27,6 +27,6 @@ class LanguageBulgarianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageBulgarian::class));
+        self::assertTrue(class_exists(LanguageBulgarian::class));
     }
 }
diff --git a/tests/app/Module/LanguageCatalanTest.php b/tests/app/Module/LanguageCatalanTest.php
index 215443f60d..f348979b5d 100644
--- a/tests/app/Module/LanguageCatalanTest.php
+++ b/tests/app/Module/LanguageCatalanTest.php
@@ -27,6 +27,6 @@ class LanguageCatalanTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageCatalan::class));
+        self::assertTrue(class_exists(LanguageCatalan::class));
     }
 }
diff --git a/tests/app/Module/LanguageChineseSimplifiedTest.php b/tests/app/Module/LanguageChineseSimplifiedTest.php
index 96ae694b43..63a55c4750 100644
--- a/tests/app/Module/LanguageChineseSimplifiedTest.php
+++ b/tests/app/Module/LanguageChineseSimplifiedTest.php
@@ -27,6 +27,6 @@ class LanguageChineseSimplifiedTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageChineseSimplified::class));
+        self::assertTrue(class_exists(LanguageChineseSimplified::class));
     }
 }
diff --git a/tests/app/Module/LanguageChineseTraditionalTest.php b/tests/app/Module/LanguageChineseTraditionalTest.php
index a79191948a..a7ad6c496f 100644
--- a/tests/app/Module/LanguageChineseTraditionalTest.php
+++ b/tests/app/Module/LanguageChineseTraditionalTest.php
@@ -27,6 +27,6 @@ class LanguageChineseTraditionalTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageChineseTraditional::class));
+        self::assertTrue(class_exists(LanguageChineseTraditional::class));
     }
 }
diff --git a/tests/app/Module/LanguageCroatianTest.php b/tests/app/Module/LanguageCroatianTest.php
index 4fb2729f49..adb1cbb454 100644
--- a/tests/app/Module/LanguageCroatianTest.php
+++ b/tests/app/Module/LanguageCroatianTest.php
@@ -27,6 +27,6 @@ class LanguageCroatianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageCroatian::class));
+        self::assertTrue(class_exists(LanguageCroatian::class));
     }
 }
diff --git a/tests/app/Module/LanguageCzechTest.php b/tests/app/Module/LanguageCzechTest.php
index e8344f7d10..377f7a5466 100644
--- a/tests/app/Module/LanguageCzechTest.php
+++ b/tests/app/Module/LanguageCzechTest.php
@@ -27,6 +27,6 @@ class LanguageCzechTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageCzech::class));
+        self::assertTrue(class_exists(LanguageCzech::class));
     }
 }
diff --git a/tests/app/Module/LanguageDanishTest.php b/tests/app/Module/LanguageDanishTest.php
index 07540ab9bf..ed8e33c864 100644
--- a/tests/app/Module/LanguageDanishTest.php
+++ b/tests/app/Module/LanguageDanishTest.php
@@ -27,6 +27,6 @@ class LanguageDanishTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageDanish::class));
+        self::assertTrue(class_exists(LanguageDanish::class));
     }
 }
diff --git a/tests/app/Module/LanguageDivehiTest.php b/tests/app/Module/LanguageDivehiTest.php
index bbeca11bb3..61cc6462c7 100644
--- a/tests/app/Module/LanguageDivehiTest.php
+++ b/tests/app/Module/LanguageDivehiTest.php
@@ -27,6 +27,6 @@ class LanguageDivehiTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageDivehi::class));
+        self::assertTrue(class_exists(LanguageDivehi::class));
     }
 }
diff --git a/tests/app/Module/LanguageDutchTest.php b/tests/app/Module/LanguageDutchTest.php
index 3a776c7017..c36708612b 100644
--- a/tests/app/Module/LanguageDutchTest.php
+++ b/tests/app/Module/LanguageDutchTest.php
@@ -27,6 +27,6 @@ class LanguageDutchTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageDutch::class));
+        self::assertTrue(class_exists(LanguageDutch::class));
     }
 }
diff --git a/tests/app/Module/LanguageEnglishAustraliaTest.php b/tests/app/Module/LanguageEnglishAustraliaTest.php
index 53433f9a3c..88b9b7af5a 100644
--- a/tests/app/Module/LanguageEnglishAustraliaTest.php
+++ b/tests/app/Module/LanguageEnglishAustraliaTest.php
@@ -27,6 +27,6 @@ class LanguageEnglishAustraliaTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageEnglishAustralia::class));
+        self::assertTrue(class_exists(LanguageEnglishAustralia::class));
     }
 }
diff --git a/tests/app/Module/LanguageEnglishGreatBritainTest.php b/tests/app/Module/LanguageEnglishGreatBritainTest.php
index 0f994efe26..790c20d656 100644
--- a/tests/app/Module/LanguageEnglishGreatBritainTest.php
+++ b/tests/app/Module/LanguageEnglishGreatBritainTest.php
@@ -27,6 +27,6 @@ class LanguageEnglishGreatBritainTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageEnglishGreatBritain::class));
+        self::assertTrue(class_exists(LanguageEnglishGreatBritain::class));
     }
 }
diff --git a/tests/app/Module/LanguageEnglishUnitedStatesTest.php b/tests/app/Module/LanguageEnglishUnitedStatesTest.php
index ce1807e160..d6a1a9dc99 100644
--- a/tests/app/Module/LanguageEnglishUnitedStatesTest.php
+++ b/tests/app/Module/LanguageEnglishUnitedStatesTest.php
@@ -27,6 +27,6 @@ class LanguageEnglishUnitedStatesTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageEnglishUnitedStates::class));
+        self::assertTrue(class_exists(LanguageEnglishUnitedStates::class));
     }
 }
diff --git a/tests/app/Module/LanguageEstonianTest.php b/tests/app/Module/LanguageEstonianTest.php
index c22b0ab5c9..32fae9f77a 100644
--- a/tests/app/Module/LanguageEstonianTest.php
+++ b/tests/app/Module/LanguageEstonianTest.php
@@ -27,6 +27,6 @@ class LanguageEstonianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageEstonian::class));
+        self::assertTrue(class_exists(LanguageEstonian::class));
     }
 }
diff --git a/tests/app/Module/LanguageFaroeseTest.php b/tests/app/Module/LanguageFaroeseTest.php
index 074ba2c013..0de78506b0 100644
--- a/tests/app/Module/LanguageFaroeseTest.php
+++ b/tests/app/Module/LanguageFaroeseTest.php
@@ -27,6 +27,6 @@ class LanguageFaroeseTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageFaroese::class));
+        self::assertTrue(class_exists(LanguageFaroese::class));
     }
 }
diff --git a/tests/app/Module/LanguageFarsiTest.php b/tests/app/Module/LanguageFarsiTest.php
index c7fcf6b59c..f4b4959147 100644
--- a/tests/app/Module/LanguageFarsiTest.php
+++ b/tests/app/Module/LanguageFarsiTest.php
@@ -27,6 +27,6 @@ class LanguageFarsiTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageFarsi::class));
+        self::assertTrue(class_exists(LanguageFarsi::class));
     }
 }
diff --git a/tests/app/Module/LanguageFinnishTest.php b/tests/app/Module/LanguageFinnishTest.php
index 48930fc455..f39a269319 100644
--- a/tests/app/Module/LanguageFinnishTest.php
+++ b/tests/app/Module/LanguageFinnishTest.php
@@ -27,6 +27,6 @@ class LanguageFinnishTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageFinnish::class));
+        self::assertTrue(class_exists(LanguageFinnish::class));
     }
 }
diff --git a/tests/app/Module/LanguageFrenchCanadaTest.php b/tests/app/Module/LanguageFrenchCanadaTest.php
index 38f42bc37f..095f465b31 100644
--- a/tests/app/Module/LanguageFrenchCanadaTest.php
+++ b/tests/app/Module/LanguageFrenchCanadaTest.php
@@ -27,6 +27,6 @@ class LanguageFrenchCanadaTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageFrenchCanada::class));
+        self::assertTrue(class_exists(LanguageFrenchCanada::class));
     }
 }
diff --git a/tests/app/Module/LanguageFrenchTest.php b/tests/app/Module/LanguageFrenchTest.php
index ac787a2191..2a46ff1c36 100644
--- a/tests/app/Module/LanguageFrenchTest.php
+++ b/tests/app/Module/LanguageFrenchTest.php
@@ -27,6 +27,6 @@ class LanguageFrenchTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageFrench::class));
+        self::assertTrue(class_exists(LanguageFrench::class));
     }
 }
diff --git a/tests/app/Module/LanguageGalicianTest.php b/tests/app/Module/LanguageGalicianTest.php
index e3c5d51712..d87ba914ee 100644
--- a/tests/app/Module/LanguageGalicianTest.php
+++ b/tests/app/Module/LanguageGalicianTest.php
@@ -27,6 +27,6 @@ class LanguageGalicianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageGalician::class));
+        self::assertTrue(class_exists(LanguageGalician::class));
     }
 }
diff --git a/tests/app/Module/LanguageGeorgianTest.php b/tests/app/Module/LanguageGeorgianTest.php
index 787c35b016..f3049050c1 100644
--- a/tests/app/Module/LanguageGeorgianTest.php
+++ b/tests/app/Module/LanguageGeorgianTest.php
@@ -27,6 +27,6 @@ class LanguageGeorgianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageGeorgian::class));
+        self::assertTrue(class_exists(LanguageGeorgian::class));
     }
 }
diff --git a/tests/app/Module/LanguageGermanTest.php b/tests/app/Module/LanguageGermanTest.php
index e5ff286d97..559c7d4183 100644
--- a/tests/app/Module/LanguageGermanTest.php
+++ b/tests/app/Module/LanguageGermanTest.php
@@ -27,6 +27,6 @@ class LanguageGermanTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageGerman::class));
+        self::assertTrue(class_exists(LanguageGerman::class));
     }
 }
diff --git a/tests/app/Module/LanguageGreekTest.php b/tests/app/Module/LanguageGreekTest.php
index 5aa594878a..f4aee6a098 100644
--- a/tests/app/Module/LanguageGreekTest.php
+++ b/tests/app/Module/LanguageGreekTest.php
@@ -27,6 +27,6 @@ class LanguageGreekTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageGreek::class));
+        self::assertTrue(class_exists(LanguageGreek::class));
     }
 }
diff --git a/tests/app/Module/LanguageHebrewTest.php b/tests/app/Module/LanguageHebrewTest.php
index 4f6aef8085..73939a16ed 100644
--- a/tests/app/Module/LanguageHebrewTest.php
+++ b/tests/app/Module/LanguageHebrewTest.php
@@ -27,6 +27,6 @@ class LanguageHebrewTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageHebrew::class));
+        self::assertTrue(class_exists(LanguageHebrew::class));
     }
 }
diff --git a/tests/app/Module/LanguageHindiTest.php b/tests/app/Module/LanguageHindiTest.php
index 07dbc560fb..894a15c8da 100644
--- a/tests/app/Module/LanguageHindiTest.php
+++ b/tests/app/Module/LanguageHindiTest.php
@@ -27,6 +27,6 @@ class LanguageHindiTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageHindi::class));
+        self::assertTrue(class_exists(LanguageHindi::class));
     }
 }
diff --git a/tests/app/Module/LanguageHungarianTest.php b/tests/app/Module/LanguageHungarianTest.php
index fd1ad91089..3f6f95065e 100644
--- a/tests/app/Module/LanguageHungarianTest.php
+++ b/tests/app/Module/LanguageHungarianTest.php
@@ -27,6 +27,6 @@ class LanguageHungarianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageHungarian::class));
+        self::assertTrue(class_exists(LanguageHungarian::class));
     }
 }
diff --git a/tests/app/Module/LanguageIcelandicTest.php b/tests/app/Module/LanguageIcelandicTest.php
index 4aac9c2aa0..7f82daa7a9 100644
--- a/tests/app/Module/LanguageIcelandicTest.php
+++ b/tests/app/Module/LanguageIcelandicTest.php
@@ -27,6 +27,6 @@ class LanguageIcelandicTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageIcelandic::class));
+        self::assertTrue(class_exists(LanguageIcelandic::class));
     }
 }
diff --git a/tests/app/Module/LanguageIndonesianTest.php b/tests/app/Module/LanguageIndonesianTest.php
index b1af8e1bf6..e5af647797 100644
--- a/tests/app/Module/LanguageIndonesianTest.php
+++ b/tests/app/Module/LanguageIndonesianTest.php
@@ -27,6 +27,6 @@ class LanguageIndonesianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageIndonesian::class));
+        self::assertTrue(class_exists(LanguageIndonesian::class));
     }
 }
diff --git a/tests/app/Module/LanguageItalianTest.php b/tests/app/Module/LanguageItalianTest.php
index 1cb5e831a8..598b56c897 100644
--- a/tests/app/Module/LanguageItalianTest.php
+++ b/tests/app/Module/LanguageItalianTest.php
@@ -27,6 +27,6 @@ class LanguageItalianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageItalian::class));
+        self::assertTrue(class_exists(LanguageItalian::class));
     }
 }
diff --git a/tests/app/Module/LanguageJapaneseTest.php b/tests/app/Module/LanguageJapaneseTest.php
index 26332379b3..a2a7f82375 100644
--- a/tests/app/Module/LanguageJapaneseTest.php
+++ b/tests/app/Module/LanguageJapaneseTest.php
@@ -27,6 +27,6 @@ class LanguageJapaneseTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageJapanese::class));
+        self::assertTrue(class_exists(LanguageJapanese::class));
     }
 }
diff --git a/tests/app/Module/LanguageJavaneseTest.php b/tests/app/Module/LanguageJavaneseTest.php
index 4ba98bc0b7..b87453b804 100644
--- a/tests/app/Module/LanguageJavaneseTest.php
+++ b/tests/app/Module/LanguageJavaneseTest.php
@@ -27,6 +27,6 @@ class LanguageJavaneseTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageJavanese::class));
+        self::assertTrue(class_exists(LanguageJavanese::class));
     }
 }
diff --git a/tests/app/Module/LanguageKazhakTest.php b/tests/app/Module/LanguageKazhakTest.php
index 35a3933fac..74d52a4a96 100644
--- a/tests/app/Module/LanguageKazhakTest.php
+++ b/tests/app/Module/LanguageKazhakTest.php
@@ -27,6 +27,6 @@ class LanguageKazhakTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageKazhak::class));
+        self::assertTrue(class_exists(LanguageKazhak::class));
     }
 }
diff --git a/tests/app/Module/LanguageKoreanTest.php b/tests/app/Module/LanguageKoreanTest.php
index 206c53bb55..58fbf7dde0 100644
--- a/tests/app/Module/LanguageKoreanTest.php
+++ b/tests/app/Module/LanguageKoreanTest.php
@@ -27,6 +27,6 @@ class LanguageKoreanTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageKorean::class));
+        self::assertTrue(class_exists(LanguageKorean::class));
     }
 }
diff --git a/tests/app/Module/LanguageKurdishTest.php b/tests/app/Module/LanguageKurdishTest.php
index 3614b43133..9fefd04c33 100644
--- a/tests/app/Module/LanguageKurdishTest.php
+++ b/tests/app/Module/LanguageKurdishTest.php
@@ -27,6 +27,6 @@ class LanguageKurdishTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageKurdish::class));
+        self::assertTrue(class_exists(LanguageKurdish::class));
     }
 }
diff --git a/tests/app/Module/LanguageLatvianTest.php b/tests/app/Module/LanguageLatvianTest.php
index 97fe04dbed..dd11697f22 100644
--- a/tests/app/Module/LanguageLatvianTest.php
+++ b/tests/app/Module/LanguageLatvianTest.php
@@ -27,6 +27,6 @@ class LanguageLatvianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageLatvian::class));
+        self::assertTrue(class_exists(LanguageLatvian::class));
     }
 }
diff --git a/tests/app/Module/LanguageLingalaTest.php b/tests/app/Module/LanguageLingalaTest.php
index 421f031e79..d8c51dc0f3 100644
--- a/tests/app/Module/LanguageLingalaTest.php
+++ b/tests/app/Module/LanguageLingalaTest.php
@@ -27,6 +27,6 @@ class LanguageLingalaTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageLingala::class));
+        self::assertTrue(class_exists(LanguageLingala::class));
     }
 }
diff --git a/tests/app/Module/LanguageLithuanianTest.php b/tests/app/Module/LanguageLithuanianTest.php
index 45c4d2f33a..f15415dc91 100644
--- a/tests/app/Module/LanguageLithuanianTest.php
+++ b/tests/app/Module/LanguageLithuanianTest.php
@@ -27,6 +27,6 @@ class LanguageLithuanianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageLithuanian::class));
+        self::assertTrue(class_exists(LanguageLithuanian::class));
     }
 }
diff --git a/tests/app/Module/LanguageMalayTest.php b/tests/app/Module/LanguageMalayTest.php
index 408d67c658..daa390d676 100644
--- a/tests/app/Module/LanguageMalayTest.php
+++ b/tests/app/Module/LanguageMalayTest.php
@@ -27,6 +27,6 @@ class LanguageMalayTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageMalay::class));
+        self::assertTrue(class_exists(LanguageMalay::class));
     }
 }
diff --git a/tests/app/Module/LanguageMaoriTest.php b/tests/app/Module/LanguageMaoriTest.php
index b07d5eaec0..2f24da0ff1 100644
--- a/tests/app/Module/LanguageMaoriTest.php
+++ b/tests/app/Module/LanguageMaoriTest.php
@@ -27,6 +27,6 @@ class LanguageMaoriTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageMaori::class));
+        self::assertTrue(class_exists(LanguageMaori::class));
     }
 }
diff --git a/tests/app/Module/LanguageMarathiTest.php b/tests/app/Module/LanguageMarathiTest.php
index d4b44bfb85..afda3ec684 100644
--- a/tests/app/Module/LanguageMarathiTest.php
+++ b/tests/app/Module/LanguageMarathiTest.php
@@ -27,6 +27,6 @@ class LanguageMarathiTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageMarathi::class));
+        self::assertTrue(class_exists(LanguageMarathi::class));
     }
 }
diff --git a/tests/app/Module/LanguageNepaleseTest.php b/tests/app/Module/LanguageNepaleseTest.php
index e2979e6fd9..da57afb594 100644
--- a/tests/app/Module/LanguageNepaleseTest.php
+++ b/tests/app/Module/LanguageNepaleseTest.php
@@ -27,6 +27,6 @@ class LanguageNepaleseTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageNepalese::class));
+        self::assertTrue(class_exists(LanguageNepalese::class));
     }
 }
diff --git a/tests/app/Module/LanguageNorwegianBokmalTest.php b/tests/app/Module/LanguageNorwegianBokmalTest.php
index e4f321e6e8..a34a18868d 100644
--- a/tests/app/Module/LanguageNorwegianBokmalTest.php
+++ b/tests/app/Module/LanguageNorwegianBokmalTest.php
@@ -27,6 +27,6 @@ class LanguageNorwegianBokmalTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageNorwegianBokmal::class));
+        self::assertTrue(class_exists(LanguageNorwegianBokmal::class));
     }
 }
diff --git a/tests/app/Module/LanguageNorwegianNynorskTest.php b/tests/app/Module/LanguageNorwegianNynorskTest.php
index 0d77bde3d1..13e90c829d 100644
--- a/tests/app/Module/LanguageNorwegianNynorskTest.php
+++ b/tests/app/Module/LanguageNorwegianNynorskTest.php
@@ -27,6 +27,6 @@ class LanguageNorwegianNynorskTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageNorwegianNynorsk::class));
+        self::assertTrue(class_exists(LanguageNorwegianNynorsk::class));
     }
 }
diff --git a/tests/app/Module/LanguageOccitanTest.php b/tests/app/Module/LanguageOccitanTest.php
index 5282082aae..2a0ff5fd29 100644
--- a/tests/app/Module/LanguageOccitanTest.php
+++ b/tests/app/Module/LanguageOccitanTest.php
@@ -27,6 +27,6 @@ class LanguageOccitanTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageOccitan::class));
+        self::assertTrue(class_exists(LanguageOccitan::class));
     }
 }
diff --git a/tests/app/Module/LanguagePolishTest.php b/tests/app/Module/LanguagePolishTest.php
index c45429032f..5c9eaf72b3 100644
--- a/tests/app/Module/LanguagePolishTest.php
+++ b/tests/app/Module/LanguagePolishTest.php
@@ -27,6 +27,6 @@ class LanguagePolishTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguagePolish::class));
+        self::assertTrue(class_exists(LanguagePolish::class));
     }
 }
diff --git a/tests/app/Module/LanguagePortugueseBrazilTest.php b/tests/app/Module/LanguagePortugueseBrazilTest.php
index 6639501d20..eb64c38c1a 100644
--- a/tests/app/Module/LanguagePortugueseBrazilTest.php
+++ b/tests/app/Module/LanguagePortugueseBrazilTest.php
@@ -27,6 +27,6 @@ class LanguagePortugueseBrazilTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguagePortugueseBrazil::class));
+        self::assertTrue(class_exists(LanguagePortugueseBrazil::class));
     }
 }
diff --git a/tests/app/Module/LanguagePortugueseTest.php b/tests/app/Module/LanguagePortugueseTest.php
index 29faef97a5..eabeda992c 100644
--- a/tests/app/Module/LanguagePortugueseTest.php
+++ b/tests/app/Module/LanguagePortugueseTest.php
@@ -27,6 +27,6 @@ class LanguagePortugueseTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguagePortuguese::class));
+        self::assertTrue(class_exists(LanguagePortuguese::class));
     }
 }
diff --git a/tests/app/Module/LanguageRomanianTest.php b/tests/app/Module/LanguageRomanianTest.php
index c59e5343f0..d6e665d5c5 100644
--- a/tests/app/Module/LanguageRomanianTest.php
+++ b/tests/app/Module/LanguageRomanianTest.php
@@ -27,6 +27,6 @@ class LanguageRomanianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageRomanian::class));
+        self::assertTrue(class_exists(LanguageRomanian::class));
     }
 }
diff --git a/tests/app/Module/LanguageRussianTest.php b/tests/app/Module/LanguageRussianTest.php
index 99ee0bc729..010b0b9e81 100644
--- a/tests/app/Module/LanguageRussianTest.php
+++ b/tests/app/Module/LanguageRussianTest.php
@@ -27,6 +27,6 @@ class LanguageRussianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageRussian::class));
+        self::assertTrue(class_exists(LanguageRussian::class));
     }
 }
diff --git a/tests/app/Module/LanguageSerbianLatinTest.php b/tests/app/Module/LanguageSerbianLatinTest.php
index 6a5df00b66..11b00c7ff8 100644
--- a/tests/app/Module/LanguageSerbianLatinTest.php
+++ b/tests/app/Module/LanguageSerbianLatinTest.php
@@ -27,6 +27,6 @@ class LanguageSerbianLatinTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageSerbianLatin::class));
+        self::assertTrue(class_exists(LanguageSerbianLatin::class));
     }
 }
diff --git a/tests/app/Module/LanguageSerbianTest.php b/tests/app/Module/LanguageSerbianTest.php
index d97daace42..6fc1c764cd 100644
--- a/tests/app/Module/LanguageSerbianTest.php
+++ b/tests/app/Module/LanguageSerbianTest.php
@@ -27,6 +27,6 @@ class LanguageSerbianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageSerbian::class));
+        self::assertTrue(class_exists(LanguageSerbian::class));
     }
 }
diff --git a/tests/app/Module/LanguageSlovakianTest.php b/tests/app/Module/LanguageSlovakianTest.php
index 31977052cc..e4a84a80cc 100644
--- a/tests/app/Module/LanguageSlovakianTest.php
+++ b/tests/app/Module/LanguageSlovakianTest.php
@@ -27,6 +27,6 @@ class LanguageSlovakianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageSlovakian::class));
+        self::assertTrue(class_exists(LanguageSlovakian::class));
     }
 }
diff --git a/tests/app/Module/LanguageSlovenianTest.php b/tests/app/Module/LanguageSlovenianTest.php
index a9a87f678f..029d910bd1 100644
--- a/tests/app/Module/LanguageSlovenianTest.php
+++ b/tests/app/Module/LanguageSlovenianTest.php
@@ -27,6 +27,6 @@ class LanguageSlovenianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageSlovenian::class));
+        self::assertTrue(class_exists(LanguageSlovenian::class));
     }
 }
diff --git a/tests/app/Module/LanguageSpanishTest.php b/tests/app/Module/LanguageSpanishTest.php
index 8d26f21fc7..3d9d6eed95 100644
--- a/tests/app/Module/LanguageSpanishTest.php
+++ b/tests/app/Module/LanguageSpanishTest.php
@@ -27,6 +27,6 @@ class LanguageSpanishTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageSpanish::class));
+        self::assertTrue(class_exists(LanguageSpanish::class));
     }
 }
diff --git a/tests/app/Module/LanguageSundaneseTest.php b/tests/app/Module/LanguageSundaneseTest.php
index 32905c9164..8f6c55073b 100644
--- a/tests/app/Module/LanguageSundaneseTest.php
+++ b/tests/app/Module/LanguageSundaneseTest.php
@@ -27,6 +27,6 @@ class LanguageSundaneseTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageSundanese::class));
+        self::assertTrue(class_exists(LanguageSundanese::class));
     }
 }
diff --git a/tests/app/Module/LanguageSwahiliTest.php b/tests/app/Module/LanguageSwahiliTest.php
index a8866462a7..cd526b3efc 100644
--- a/tests/app/Module/LanguageSwahiliTest.php
+++ b/tests/app/Module/LanguageSwahiliTest.php
@@ -27,6 +27,6 @@ class LanguageSwahiliTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageSwahili::class));
+        self::assertTrue(class_exists(LanguageSwahili::class));
     }
 }
diff --git a/tests/app/Module/LanguageSwedishTest.php b/tests/app/Module/LanguageSwedishTest.php
index 3d18664b2a..43c943f361 100644
--- a/tests/app/Module/LanguageSwedishTest.php
+++ b/tests/app/Module/LanguageSwedishTest.php
@@ -27,6 +27,6 @@ class LanguageSwedishTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageSwedish::class));
+        self::assertTrue(class_exists(LanguageSwedish::class));
     }
 }
diff --git a/tests/app/Module/LanguageTagalogTest.php b/tests/app/Module/LanguageTagalogTest.php
index 6a24968034..2801b914ee 100644
--- a/tests/app/Module/LanguageTagalogTest.php
+++ b/tests/app/Module/LanguageTagalogTest.php
@@ -27,6 +27,6 @@ class LanguageTagalogTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageTagalog::class));
+        self::assertTrue(class_exists(LanguageTagalog::class));
     }
 }
diff --git a/tests/app/Module/LanguageTamilTest.php b/tests/app/Module/LanguageTamilTest.php
index 28e13b4a90..f37c2243f9 100644
--- a/tests/app/Module/LanguageTamilTest.php
+++ b/tests/app/Module/LanguageTamilTest.php
@@ -27,6 +27,6 @@ class LanguageTamilTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageTamil::class));
+        self::assertTrue(class_exists(LanguageTamil::class));
     }
 }
diff --git a/tests/app/Module/LanguageTatarTest.php b/tests/app/Module/LanguageTatarTest.php
index 6d126fcf93..f9b9319273 100644
--- a/tests/app/Module/LanguageTatarTest.php
+++ b/tests/app/Module/LanguageTatarTest.php
@@ -27,6 +27,6 @@ class LanguageTatarTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageTatar::class));
+        self::assertTrue(class_exists(LanguageTatar::class));
     }
 }
diff --git a/tests/app/Module/LanguageThaiTest.php b/tests/app/Module/LanguageThaiTest.php
index 419d451147..49cb112262 100644
--- a/tests/app/Module/LanguageThaiTest.php
+++ b/tests/app/Module/LanguageThaiTest.php
@@ -27,6 +27,6 @@ class LanguageThaiTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageThai::class));
+        self::assertTrue(class_exists(LanguageThai::class));
     }
 }
diff --git a/tests/app/Module/LanguageTurkishTest.php b/tests/app/Module/LanguageTurkishTest.php
index af5563c1c9..8c802fa595 100644
--- a/tests/app/Module/LanguageTurkishTest.php
+++ b/tests/app/Module/LanguageTurkishTest.php
@@ -27,6 +27,6 @@ class LanguageTurkishTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageTurkish::class));
+        self::assertTrue(class_exists(LanguageTurkish::class));
     }
 }
diff --git a/tests/app/Module/LanguageUkranianTest.php b/tests/app/Module/LanguageUkranianTest.php
index abfac3986a..068be1ae87 100644
--- a/tests/app/Module/LanguageUkranianTest.php
+++ b/tests/app/Module/LanguageUkranianTest.php
@@ -27,6 +27,6 @@ class LanguageUkranianTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageUkranian::class));
+        self::assertTrue(class_exists(LanguageUkranian::class));
     }
 }
diff --git a/tests/app/Module/LanguageUrduTest.php b/tests/app/Module/LanguageUrduTest.php
index 09b4fc78ad..90673129a1 100644
--- a/tests/app/Module/LanguageUrduTest.php
+++ b/tests/app/Module/LanguageUrduTest.php
@@ -27,6 +27,6 @@ class LanguageUrduTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageUrdu::class));
+        self::assertTrue(class_exists(LanguageUrdu::class));
     }
 }
diff --git a/tests/app/Module/LanguageVietnameseTest.php b/tests/app/Module/LanguageVietnameseTest.php
index 96296cd402..a9c4dc457e 100644
--- a/tests/app/Module/LanguageVietnameseTest.php
+++ b/tests/app/Module/LanguageVietnameseTest.php
@@ -27,6 +27,6 @@ class LanguageVietnameseTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageVietnamese::class));
+        self::assertTrue(class_exists(LanguageVietnamese::class));
     }
 }
diff --git a/tests/app/Module/LanguageWelshTest.php b/tests/app/Module/LanguageWelshTest.php
index d90cf18701..b3fffe344d 100644
--- a/tests/app/Module/LanguageWelshTest.php
+++ b/tests/app/Module/LanguageWelshTest.php
@@ -27,6 +27,6 @@ class LanguageWelshTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageWelsh::class));
+        self::assertTrue(class_exists(LanguageWelsh::class));
     }
 }
diff --git a/tests/app/Module/LanguageYiddishTest.php b/tests/app/Module/LanguageYiddishTest.php
index 05d9d6acfe..9ec3cb43a7 100644
--- a/tests/app/Module/LanguageYiddishTest.php
+++ b/tests/app/Module/LanguageYiddishTest.php
@@ -27,6 +27,6 @@ class LanguageYiddishTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LanguageYiddish::class));
+        self::assertTrue(class_exists(LanguageYiddish::class));
     }
 }
diff --git a/tests/app/Module/ListsMenuModuleTest.php b/tests/app/Module/ListsMenuModuleTest.php
index 77aa641c5d..c803b1d9a5 100644
--- a/tests/app/Module/ListsMenuModuleTest.php
+++ b/tests/app/Module/ListsMenuModuleTest.php
@@ -27,6 +27,6 @@ class ListsMenuModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(ListsMenuModule::class));
+        self::assertTrue(class_exists(ListsMenuModule::class));
     }
 }
diff --git a/tests/app/Module/LocationListModuleTest.php b/tests/app/Module/LocationListModuleTest.php
index f5dfa774d6..78248b9b5e 100644
--- a/tests/app/Module/LocationListModuleTest.php
+++ b/tests/app/Module/LocationListModuleTest.php
@@ -27,6 +27,6 @@ class LocationListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LocationListModule::class));
+        self::assertTrue(class_exists(LocationListModule::class));
     }
 }
diff --git a/tests/app/Module/LowCountriesRulersTest.php b/tests/app/Module/LowCountriesRulersTest.php
index 26994f285e..5c3b7c0559 100644
--- a/tests/app/Module/LowCountriesRulersTest.php
+++ b/tests/app/Module/LowCountriesRulersTest.php
@@ -27,6 +27,6 @@ class LowCountriesRulersTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(LowCountriesRulers::class));
+        self::assertTrue(class_exists(LowCountriesRulers::class));
     }
 }
diff --git a/tests/app/Module/MapBoxTest.php b/tests/app/Module/MapBoxTest.php
index fe0422b6c6..0d41bebfa3 100644
--- a/tests/app/Module/MapBoxTest.php
+++ b/tests/app/Module/MapBoxTest.php
@@ -27,6 +27,6 @@ class MapBoxTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(MapBox::class));
+        self::assertTrue(class_exists(MapBox::class));
     }
 }
diff --git a/tests/app/Module/MapGeoLocationGeonamesTest.php b/tests/app/Module/MapGeoLocationGeonamesTest.php
index ea559f9ba9..c62222c101 100644
--- a/tests/app/Module/MapGeoLocationGeonamesTest.php
+++ b/tests/app/Module/MapGeoLocationGeonamesTest.php
@@ -27,6 +27,6 @@ class MapGeoLocationGeonamesTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(MapGeoLocationGeonames::class));
+        self::assertTrue(class_exists(MapGeoLocationGeonames::class));
     }
 }
diff --git a/tests/app/Module/MapGeoLocationNominatimTest.php b/tests/app/Module/MapGeoLocationNominatimTest.php
index 961bd8c4c2..91bc2805a9 100644
--- a/tests/app/Module/MapGeoLocationNominatimTest.php
+++ b/tests/app/Module/MapGeoLocationNominatimTest.php
@@ -27,6 +27,6 @@ class MapGeoLocationNominatimTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(MapGeoLocationNominatim::class));
+        self::assertTrue(class_exists(MapGeoLocationNominatim::class));
     }
 }
diff --git a/tests/app/Module/MapGeoLocationOpenRouteServiceTest.php b/tests/app/Module/MapGeoLocationOpenRouteServiceTest.php
index f9044b0b96..e7fb60d85d 100644
--- a/tests/app/Module/MapGeoLocationOpenRouteServiceTest.php
+++ b/tests/app/Module/MapGeoLocationOpenRouteServiceTest.php
@@ -27,6 +27,6 @@ class MapGeoLocationOpenRouteServiceTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(MapGeoLocationOpenRouteService::class));
+        self::assertTrue(class_exists(MapGeoLocationOpenRouteService::class));
     }
 }
diff --git a/tests/app/Module/MatomoAnalyticsModuleTest.php b/tests/app/Module/MatomoAnalyticsModuleTest.php
index 3bd25cff5e..4f4b965985 100644
--- a/tests/app/Module/MatomoAnalyticsModuleTest.php
+++ b/tests/app/Module/MatomoAnalyticsModuleTest.php
@@ -27,6 +27,6 @@ class MatomoAnalyticsModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(MatomoAnalyticsModule::class));
+        self::assertTrue(class_exists(MatomoAnalyticsModule::class));
     }
 }
diff --git a/tests/app/Module/MediaListModuleTest.php b/tests/app/Module/MediaListModuleTest.php
index e879e7b0a9..cc421efd4c 100644
--- a/tests/app/Module/MediaListModuleTest.php
+++ b/tests/app/Module/MediaListModuleTest.php
@@ -27,6 +27,6 @@ class MediaListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(MediaListModule::class));
+        self::assertTrue(class_exists(MediaListModule::class));
     }
 }
diff --git a/tests/app/Module/MinimalThemeTest.php b/tests/app/Module/MinimalThemeTest.php
index ca4da4292d..a7c2f91438 100644
--- a/tests/app/Module/MinimalThemeTest.php
+++ b/tests/app/Module/MinimalThemeTest.php
@@ -27,6 +27,6 @@ class MinimalThemeTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(MinimalTheme::class));
+        self::assertTrue(class_exists(MinimalTheme::class));
     }
 }
diff --git a/tests/app/Module/NoteListModuleTest.php b/tests/app/Module/NoteListModuleTest.php
index de9d242175..3c78fa948b 100644
--- a/tests/app/Module/NoteListModuleTest.php
+++ b/tests/app/Module/NoteListModuleTest.php
@@ -27,6 +27,6 @@ class NoteListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(NoteListModule::class));
+        self::assertTrue(class_exists(NoteListModule::class));
     }
 }
diff --git a/tests/app/Module/OpenRouteServiceAutocompleteTest.php b/tests/app/Module/OpenRouteServiceAutocompleteTest.php
index 8a0dcfa7c7..839db9761a 100644
--- a/tests/app/Module/OpenRouteServiceAutocompleteTest.php
+++ b/tests/app/Module/OpenRouteServiceAutocompleteTest.php
@@ -27,6 +27,6 @@ class OpenRouteServiceAutocompleteTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(OpenRouteServiceAutocomplete::class));
+        self::assertTrue(class_exists(OpenRouteServiceAutocomplete::class));
     }
 }
diff --git a/tests/app/Module/OpenStreetMapTest.php b/tests/app/Module/OpenStreetMapTest.php
index 1975c046c3..415faeb45e 100644
--- a/tests/app/Module/OpenStreetMapTest.php
+++ b/tests/app/Module/OpenStreetMapTest.php
@@ -27,6 +27,6 @@ class OpenStreetMapTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(OpenStreetMap::class));
+        self::assertTrue(class_exists(OpenStreetMap::class));
     }
 }
diff --git a/tests/app/Module/PedigreeMapModuleTest.php b/tests/app/Module/PedigreeMapModuleTest.php
index f143a342c1..895565a055 100644
--- a/tests/app/Module/PedigreeMapModuleTest.php
+++ b/tests/app/Module/PedigreeMapModuleTest.php
@@ -27,6 +27,6 @@ class PedigreeMapModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(PedigreeMapModule::class));
+        self::assertTrue(class_exists(PedigreeMapModule::class));
     }
 }
diff --git a/tests/app/Module/PlaceHierarchyListModuleTest.php b/tests/app/Module/PlaceHierarchyListModuleTest.php
index 4e197b7a66..72eae46519 100644
--- a/tests/app/Module/PlaceHierarchyListModuleTest.php
+++ b/tests/app/Module/PlaceHierarchyListModuleTest.php
@@ -27,6 +27,6 @@ class PlaceHierarchyListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(PlaceHierarchyListModule::class));
+        self::assertTrue(class_exists(PlaceHierarchyListModule::class));
     }
 }
diff --git a/tests/app/Module/PlacesModuleTest.php b/tests/app/Module/PlacesModuleTest.php
index fbe1406aa9..aa591fc55c 100644
--- a/tests/app/Module/PlacesModuleTest.php
+++ b/tests/app/Module/PlacesModuleTest.php
@@ -27,6 +27,6 @@ class PlacesModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(PlacesModule::class));
+        self::assertTrue(class_exists(PlacesModule::class));
     }
 }
diff --git a/tests/app/Module/PoweredByWebtreesModuleTest.php b/tests/app/Module/PoweredByWebtreesModuleTest.php
index 76b7eb3693..c330782042 100644
--- a/tests/app/Module/PoweredByWebtreesModuleTest.php
+++ b/tests/app/Module/PoweredByWebtreesModuleTest.php
@@ -27,6 +27,6 @@ class PoweredByWebtreesModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(PoweredByWebtreesModule::class));
+        self::assertTrue(class_exists(PoweredByWebtreesModule::class));
     }
 }
diff --git a/tests/app/Module/PrivacyPolicyTest.php b/tests/app/Module/PrivacyPolicyTest.php
index 8199034bd4..0c3c993beb 100644
--- a/tests/app/Module/PrivacyPolicyTest.php
+++ b/tests/app/Module/PrivacyPolicyTest.php
@@ -27,6 +27,6 @@ class PrivacyPolicyTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(PrivacyPolicy::class));
+        self::assertTrue(class_exists(PrivacyPolicy::class));
     }
 }
diff --git a/tests/app/Module/RedirectLegacyUrlsModuleTest.php b/tests/app/Module/RedirectLegacyUrlsModuleTest.php
index bb57ac0049..d425995aef 100644
--- a/tests/app/Module/RedirectLegacyUrlsModuleTest.php
+++ b/tests/app/Module/RedirectLegacyUrlsModuleTest.php
@@ -27,6 +27,6 @@ class RedirectLegacyUrlsModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(RedirectLegacyUrlsModule::class));
+        self::assertTrue(class_exists(RedirectLegacyUrlsModule::class));
     }
 }
diff --git a/tests/app/Module/ReportsMenuModuleTest.php b/tests/app/Module/ReportsMenuModuleTest.php
index e76c485dc4..8b83f39cce 100644
--- a/tests/app/Module/ReportsMenuModuleTest.php
+++ b/tests/app/Module/ReportsMenuModuleTest.php
@@ -27,6 +27,6 @@ class ReportsMenuModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(ReportsMenuModule::class));
+        self::assertTrue(class_exists(ReportsMenuModule::class));
     }
 }
diff --git a/tests/app/Module/RepositoryListModuleTest.php b/tests/app/Module/RepositoryListModuleTest.php
index 7fb1ab44b7..e88da5a68f 100644
--- a/tests/app/Module/RepositoryListModuleTest.php
+++ b/tests/app/Module/RepositoryListModuleTest.php
@@ -27,6 +27,6 @@ class RepositoryListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(RepositoryListModule::class));
+        self::assertTrue(class_exists(RepositoryListModule::class));
     }
 }
diff --git a/tests/app/Module/SearchMenuModuleTest.php b/tests/app/Module/SearchMenuModuleTest.php
index 69adea701f..1cba61636c 100644
--- a/tests/app/Module/SearchMenuModuleTest.php
+++ b/tests/app/Module/SearchMenuModuleTest.php
@@ -27,6 +27,6 @@ class SearchMenuModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(SearchMenuModule::class));
+        self::assertTrue(class_exists(SearchMenuModule::class));
     }
 }
diff --git a/tests/app/Module/ShareAnniversaryModuleTest.php b/tests/app/Module/ShareAnniversaryModuleTest.php
index 011c2d16fb..9b2819dc6d 100644
--- a/tests/app/Module/ShareAnniversaryModuleTest.php
+++ b/tests/app/Module/ShareAnniversaryModuleTest.php
@@ -27,6 +27,6 @@ class ShareAnniversaryModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(ShareAnniversaryModule::class));
+        self::assertTrue(class_exists(ShareAnniversaryModule::class));
     }
 }
diff --git a/tests/app/Module/ShareUrlModuleTest.php b/tests/app/Module/ShareUrlModuleTest.php
index 9125cc09bf..44f0259c62 100644
--- a/tests/app/Module/ShareUrlModuleTest.php
+++ b/tests/app/Module/ShareUrlModuleTest.php
@@ -27,6 +27,6 @@ class ShareUrlModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(ShareUrlModule::class));
+        self::assertTrue(class_exists(ShareUrlModule::class));
     }
 }
diff --git a/tests/app/Module/SourceListModuleTest.php b/tests/app/Module/SourceListModuleTest.php
index e61dc862ec..3e057fb69f 100644
--- a/tests/app/Module/SourceListModuleTest.php
+++ b/tests/app/Module/SourceListModuleTest.php
@@ -27,6 +27,6 @@ class SourceListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(SourceListModule::class));
+        self::assertTrue(class_exists(SourceListModule::class));
     }
 }
diff --git a/tests/app/Module/StatcounterModuleTest.php b/tests/app/Module/StatcounterModuleTest.php
index 44c53d6a4b..b63bde217a 100644
--- a/tests/app/Module/StatcounterModuleTest.php
+++ b/tests/app/Module/StatcounterModuleTest.php
@@ -27,6 +27,6 @@ class StatcounterModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(StatcounterModule::class));
+        self::assertTrue(class_exists(StatcounterModule::class));
     }
 }
diff --git a/tests/app/Module/SubmitterListModuleTest.php b/tests/app/Module/SubmitterListModuleTest.php
index d118b1115f..5e8b4c9222 100644
--- a/tests/app/Module/SubmitterListModuleTest.php
+++ b/tests/app/Module/SubmitterListModuleTest.php
@@ -27,6 +27,6 @@ class SubmitterListModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(SubmitterListModule::class));
+        self::assertTrue(class_exists(SubmitterListModule::class));
     }
 }
diff --git a/tests/app/Module/TreesMenuModuleTest.php b/tests/app/Module/TreesMenuModuleTest.php
index a21eb4ceb5..ec1971c080 100644
--- a/tests/app/Module/TreesMenuModuleTest.php
+++ b/tests/app/Module/TreesMenuModuleTest.php
@@ -27,6 +27,6 @@ class TreesMenuModuleTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(TreesMenuModule::class));
+        self::assertTrue(class_exists(TreesMenuModule::class));
     }
 }
diff --git a/tests/app/Module/USPresidentsTest.php b/tests/app/Module/USPresidentsTest.php
index 054a13c796..ab993ed0d6 100644
--- a/tests/app/Module/USPresidentsTest.php
+++ b/tests/app/Module/USPresidentsTest.php
@@ -27,6 +27,6 @@ class USPresidentsTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(USPresidents::class));
+        self::assertTrue(class_exists(USPresidents::class));
     }
 }
diff --git a/tests/app/Module/WebtreesThemeTest.php b/tests/app/Module/WebtreesThemeTest.php
index f1667e5321..6576b567f3 100644
--- a/tests/app/Module/WebtreesThemeTest.php
+++ b/tests/app/Module/WebtreesThemeTest.php
@@ -27,6 +27,6 @@ class WebtreesThemeTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(WebtreesTheme::class));
+        self::assertTrue(class_exists(WebtreesTheme::class));
     }
 }
diff --git a/tests/app/Module/XeneaThemeTest.php b/tests/app/Module/XeneaThemeTest.php
index 546e03b05d..079e11b9d0 100644
--- a/tests/app/Module/XeneaThemeTest.php
+++ b/tests/app/Module/XeneaThemeTest.php
@@ -27,6 +27,6 @@ class XeneaThemeTest extends TestCase
 {
     public function testClass(): void
     {
-        $this->assertTrue(class_exists(XeneaTheme::class));
+        self::assertTrue(class_exists(XeneaTheme::class));
     }
 }