diff --git a/tests/unit/Framework/MockObject/MockObjectTest.php b/tests/unit/Framework/MockObject/MockObjectTest.php
index fe916f90332..cad33c56895 100644
--- a/tests/unit/Framework/MockObject/MockObjectTest.php
+++ b/tests/unit/Framework/MockObject/MockObjectTest.php
@@ -947,7 +947,7 @@ public function testCreateTwoMocksOfOneWsdlFile(): void
      */
     public function testCreateMockOfWsdlFileWithSpecialChars(): void
     {
-        $mock = $this->getMockFromWsdl(__DIR__ . '/_fixture/Go ogle-Sea.rch.wsdl');
+        $mock = $this->getMockFromWsdl(TEST_FILES_PATH . 'Go ogle-Sea.rch.wsdl');
 
         $this->assertStringStartsWith('Mock_GoogleSearch_', \get_class($mock));
     }
diff --git a/tests/unit/Util/ConfigurationTest.php b/tests/unit/Util/ConfigurationTest.php
index 95d8652ebff..8e34e85ee55 100644
--- a/tests/unit/Util/ConfigurationTest.php
+++ b/tests/unit/Util/ConfigurationTest.php
@@ -428,11 +428,19 @@ public function testHandlePHPConfigurationDoesForceOverwrittenExistingEnvArrayVa
      */
     public function testHandlePHPConfigurationDoesNotOverriteVariablesFromPutEnv(): void
     {
+        $backupFoo = \getenv('foo');
+
         \putenv('foo=putenv');
         $this->configuration->handlePHPConfiguration();
 
         $this->assertEquals('putenv', $_ENV['foo']);
         $this->assertEquals('putenv', \getenv('foo'));
+
+        if ($backupFoo === false) {
+            \putenv('foo');     // delete variable from environment
+        } else {
+            \putenv("foo=$backupFoo");
+        }
     }
 
     /**