diff --git a/core/modules/comment/src/Tests/CommentPreviewTest.php b/core/modules/comment/src/Tests/CommentPreviewTest.php
index 8d188c3..e2632cf 100644
--- a/core/modules/comment/src/Tests/CommentPreviewTest.php
+++ b/core/modules/comment/src/Tests/CommentPreviewTest.php
@@ -44,7 +44,11 @@ function testCommentPreview() {
     \Drupal::config('user.settings')->set('signatures', 1)->save();
     $test_signature = $this->randomMachineName();
     $edit['signature[value]'] = '<a href="http://example.com/">' . $test_signature. '</a>';
-    $image = current($this->drupalGetTestFiles('image'));
+    foreach ($this->drupalGetTestFiles('image') as $image) {
+      if ($image->filename == 'image-test.png') {
+        break;
+      }
+    }
     $edit['files[user_picture_0]'] = drupal_realpath($image->uri);
     $this->drupalPostForm('user/' . $this->web_user->id() . '/edit', $edit, t('Save'));
 
diff --git a/core/modules/image/src/Tests/ImageAdminStylesTest.php b/core/modules/image/src/Tests/ImageAdminStylesTest.php
index ef53426..881475f 100644
--- a/core/modules/image/src/Tests/ImageAdminStylesTest.php
+++ b/core/modules/image/src/Tests/ImageAdminStylesTest.php
@@ -298,7 +298,11 @@ function testStyleReplacement() {
       ->save();
 
     // Create a new node with an image attached.
-    $test_image = current($this->drupalGetTestFiles('image'));
+    foreach ($this->drupalGetTestFiles('image') as $test_image) {
+      if ($test_image->filename == 'image-test.png') {
+        break;
+      }
+    }
     $nid = $this->uploadNodeImage($test_image, $field_name, 'article');
     $node = Node::load($nid);
 
@@ -436,7 +440,11 @@ function testConfigImport() {
       ->save();
 
     // Create a new node with an image attached.
-    $test_image = current($this->drupalGetTestFiles('image'));
+    foreach ($this->drupalGetTestFiles('image') as $test_image) {
+      if ($test_image->filename == 'image-test.png') {
+        break;
+      }
+    }
     $nid = $this->uploadNodeImage($test_image, $field_name, 'article');
     $node = Node::load($nid);
 
diff --git a/core/modules/rdf/src/Tests/ImageFieldAttributesTest.php b/core/modules/rdf/src/Tests/ImageFieldAttributesTest.php
index ec41a77..e9a1fb5 100644
--- a/core/modules/rdf/src/Tests/ImageFieldAttributesTest.php
+++ b/core/modules/rdf/src/Tests/ImageFieldAttributesTest.php
@@ -63,7 +63,11 @@ protected function setUp() {
       ->save();
 
     // Get the test image that simpletest provides.
-    $image = current($this->drupalGetTestFiles('image'));
+    foreach ($this->drupalGetTestFiles('image') as $image) {
+      if ($image->filename == 'image-test.png') {
+        break;
+      }
+    }
 
     // Save a node with the image.
     $nid = $this->uploadNodeImage($image, $this->fieldName, 'article');
diff --git a/core/modules/user/src/Tests/UserPictureTest.php b/core/modules/user/src/Tests/UserPictureTest.php
index 639c382..d609413 100644
--- a/core/modules/user/src/Tests/UserPictureTest.php
+++ b/core/modules/user/src/Tests/UserPictureTest.php
@@ -48,7 +48,11 @@ function testCreateDeletePicture() {
     $this->drupalLogin($this->web_user);
 
     // Save a new picture.
-    $image = current($this->drupalGetTestFiles('image'));
+    foreach ($this->drupalGetTestFiles('image') as $image) {
+      if ($image->filename == 'image-test.png') {
+        break;
+      }
+    }
     $file = $this->saveUserPicture($image);
 
     // Verify that the image is displayed on the user account page.
@@ -85,7 +89,11 @@ function testPictureOnNodeComment() {
     $this->drupalLogin($this->web_user);
 
     // Save a new picture.
-    $image = current($this->drupalGetTestFiles('image'));
+    foreach ($this->drupalGetTestFiles('image') as $image) {
+      if ($image->filename == 'image-test.png') {
+        break;
+      }
+    }
     $file = $this->saveUserPicture($image);
 
     $node = $this->drupalCreateNode(array('type' => 'article'));