Fix tests coverage

.github/workflows/wpautoload.yml

@@ -20,7 +20,7 @@ jobs:
               run: composer cs
 
             - name: Tests coverage
-              run: vendor/phpunit/phpunit/phpunit --configuration tests/phpunit/phpunit.xml --coverage-clover coverage.xml
+              run: XDEBUG_MODE=coverage vendor/phpunit/phpunit/phpunit --configuration tests/phpunit/phpunit.xml --coverage-clover coverage.xml
 
             - name: Send to coveralls
               run: php vendor/bin/php-coveralls -v

.gitignore

@@ -4,3 +4,4 @@ vendor
 tests/phpunit/.phpunit.result.cache
 cache
 .phpcs.cache
+coverage.xml

tests/phpunit/phpunit.xml

@@ -1,13 +1,13 @@
 <?xml version="1.0"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="./bootstrap.php" backupGlobals="false" colors="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" beStrictAboutTestsThatDoNotTestAnything="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
-	<coverage>
-		<include>
-			<directory suffix=".php">../../src/</directory>
-		</include>
-	</coverage>
-	<testsuites>
-		<testsuite name="WP-Autoload-tests">
-			<directory suffix=".php">./tests/</directory>
-		</testsuite>
-	</testsuites>
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">../../src/</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="WP-Autoload-tests">
+      <directory suffix=".php">./tests/</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>