diff --git a/test/File/IsCompressedTest.php b/test/File/IsCompressedTest.php
index 690fd4eea..dd0e71c2c 100644
--- a/test/File/IsCompressedTest.php
+++ b/test/File/IsCompressedTest.php
@@ -33,6 +33,11 @@ protected function getMagicMime()
             return __DIR__ . '/_files/magic.lte.5.3.10.mime';
         }
 
+        // Ubuntu has backported the changes in 12.04 to PHP 5.3.10.
+        if (strpos(PHP_VERSION, 'ubuntu') !== false && version_compare(PHP_VERSION, '5.3.10', '>=')) {
+            return __DIR__ . '/_files/magic.lte.5.3.10.mime';
+        }
+
         return __DIR__ . '/_files/magic.mime';
     }
 
diff --git a/test/File/IsImageTest.php b/test/File/IsImageTest.php
index e7bcea6ec..2ffa7552c 100644
--- a/test/File/IsImageTest.php
+++ b/test/File/IsImageTest.php
@@ -31,6 +31,11 @@ protected function getMagicMime()
             return __DIR__ . '/_files/magic.lte.5.3.10.mime';
         }
 
+        // Ubuntu has backported the changes in 12.04 to PHP 5.3.10.
+        if (strpos(PHP_VERSION, 'ubuntu') !== false && version_compare(PHP_VERSION, '5.3.10', '>=')) {
+            return __DIR__ . '/_files/magic.lte.5.3.10.mime';
+        }
+
         return __DIR__ . '/_files/magic.mime';
     }