diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index b2d7715..601f4f7 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -51,7 +51,7 @@ jobs:
       run: composer update --prefer-dist --no-progress
 
     - name: Run test suite
-      run: ./vendor/bin/phpunit --coverage-clover=coverage.xml tests
+      run: ./vendor/bin/phpunit --coverage-clover=coverage.xml
 
     - name: Run coding style check
       run: ./vendor/bin/phpcs --standard=PSR1 src/
diff --git a/.gitignore b/.gitignore
index 832b322..3bac1db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 .idea
-.phpunit.cache
 .phpunit.result.cache
 coveralls.json
 composer.lock
diff --git a/composer.json b/composer.json
index b5a66d5..ac52558 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
 	"require-dev": {
 		"squizlabs/php_codesniffer": "^3.5",
 		"php-coveralls/php-coveralls": "~2.0",
-		"phpunit/phpunit": "~7.0||~8.0||~9.0||~10.0||~11.0"
+		"phpunit/phpunit": "~7.0||~8.0||~9.0"
 	},
 	"autoload": {
 		"psr-4": {
diff --git a/phpunit.xml b/phpunit.xml
index 8eccef3..5cba0cf 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,30 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd" bootstrap="vendor/autoload.php" cacheDirectory=".phpunit.cache">
-    <source>
-        <include>
-            <directory suffix=".php">src</directory>
-        </include>
-    </source>
 
-    <coverage>
-        <report>
-            <clover outputFile="coverage.xml"/>
-        </report>
-    </coverage>
-
-    <filter>
-        <whitelist>
-            <directory suffix=".php">src/</directory>
-        </whitelist>
-    </filter>
-
-    <logging>
-        <log type="coverage-clover" target="coverage.xml"/>
-    </logging>
-
-    <testsuites>
-        <testsuite name="Map">
-            <directory>tests</directory>
-        </testsuite>
-    </testsuites>
+<phpunit>
+	<testsuites>
+		<testsuite name="Map">
+			<directory>tests/</directory>
+		</testsuite>
+	</testsuites>
+	<filter>
+		<whitelist>
+			<directory suffix=".php">src/</directory>
+		</whitelist>
+	</filter>
+	<logging>
+		<log type="coverage-clover" target="coverage.xml"/>
+	</logging>
 </phpunit>