diff --git a/core/modules/config/src/Tests/ConfigCRUDTest.php b/core/modules/config/src/Tests/ConfigCRUDTest.php
index 435a922..3d61c9e 100644
--- a/core/modules/config/src/Tests/ConfigCRUDTest.php
+++ b/core/modules/config/src/Tests/ConfigCRUDTest.php
@@ -248,7 +248,7 @@ public function testDataTypes() {
     $storage = new DatabaseStorage($this->container->get('database'), 'config');
     $name = 'config_test.types';
     $config = $this->config($name);
-    $original_content = file_get_contents(__DIR__ . '/../../tests/config_test/' . InstallStorage::CONFIG_INSTALL_DIRECTORY . "/$name.yml");
+    $original_content = file_get_contents(drupal_get_path('module', 'config_test') . '/' . InstallStorage::CONFIG_INSTALL_DIRECTORY . "/$name.yml");
     $this->verbose('<pre>' . $original_content . "\n" . var_export($storage->read($name), TRUE));
 
     // Verify variable data types are intact.
diff --git a/core/modules/field/src/Tests/FieldImportCreateTest.php b/core/modules/field/src/Tests/FieldImportCreateTest.php
index 4036446..82cb962 100644
--- a/core/modules/field/src/Tests/FieldImportCreateTest.php
+++ b/core/modules/field/src/Tests/FieldImportCreateTest.php
@@ -97,7 +97,7 @@ function testImportCreate() {
     $this->copyConfig($active, $sync);
 
     // Add the new files to the sync directory.
-    $src_dir = __DIR__ . '/../../tests/modules/field_test_config/sync';
+    $src_dir = drupal_get_path('module', 'field_test_config') . '/sync';
     $target_dir = $this->configDirectories[CONFIG_SYNC_DIRECTORY];
     $this->assertTrue(file_unmanaged_copy("$src_dir/$field_storage_config_name.yml", "$target_dir/$field_storage_config_name.yml"));
     $this->assertTrue(file_unmanaged_copy("$src_dir/$field_config_name.yml", "$target_dir/$field_config_name.yml"));
diff --git a/core/modules/node/src/Tests/Config/NodeImportCreateTest.php b/core/modules/node/src/Tests/Config/NodeImportCreateTest.php
index 4784d1a..fc87cf3 100644
--- a/core/modules/node/src/Tests/Config/NodeImportCreateTest.php
+++ b/core/modules/node/src/Tests/Config/NodeImportCreateTest.php
@@ -64,7 +64,7 @@ public function testImportCreate() {
     $sync = $this->container->get('config.storage.sync');
     $this->copyConfig($active, $sync);
     // Manually add new node type.
-    $src_dir = __DIR__ . '/../../../tests/modules/node_test_config/sync';
+    $src_dir = drupal_get_path('module', 'node_test_config') . '/sync';
     $target_dir = $this->configDirectories[CONFIG_SYNC_DIRECTORY];
     $this->assertTrue(file_unmanaged_copy("$src_dir/$node_type_config_name.yml", "$target_dir/$node_type_config_name.yml"));
 
diff --git a/core/modules/system/src/Tests/Theme/ThemeTest.php b/core/modules/system/src/Tests/Theme/ThemeTest.php
index 4af1add..a84ef8f 100644
--- a/core/modules/system/src/Tests/Theme/ThemeTest.php
+++ b/core/modules/system/src/Tests/Theme/ThemeTest.php
@@ -265,7 +265,7 @@ function testClassLoading() {
    */
   public function testFindThemeTemplates() {
     $registry = $this->container->get('theme.registry')->get();
-    $templates = drupal_find_theme_templates($registry, '.html.twig', __DIR__ . '/../../../tests/themes/test_theme');
+    $templates = drupal_find_theme_templates($registry, '.html.twig', drupal_get_path('theme', 'test_theme'));
     $this->assertEqual($templates['node__1']['template'], 'node--1', 'Template node--1.tpl.twig was found in test_theme.');
   }