diff --git a/core/modules/migrate/tests/src/Kernel/process/CopyFileTest.php b/core/modules/migrate/tests/src/Kernel/process/CopyFileTest.php
index ecd0535..9602867 100644
--- a/core/modules/migrate/tests/src/Kernel/process/CopyFileTest.php
+++ b/core/modules/migrate/tests/src/Kernel/process/CopyFileTest.php
@@ -211,7 +211,7 @@ function createUri($filepath = NULL, $contents = NULL, $scheme = NULL) {
     }
 
     file_put_contents($filepath, $contents);
-    $this->assertFileExists($filepath, 'The test file exists on the disk.');
+    $this->assertFileExists($filepath, t('The test file exists on the disk.'));
     return $filepath;
   }