diff --git a/src/Illuminate/Foundation/Testing/TestResponse.php b/src/Illuminate/Foundation/Testing/TestResponse.php
index ab983b1d54fb..bca952baf553 100644
--- a/src/Illuminate/Foundation/Testing/TestResponse.php
+++ b/src/Illuminate/Foundation/Testing/TestResponse.php
@@ -114,7 +114,7 @@ public function assertHeader($headerName, $value = null)
 
         if (! is_null($value)) {
             PHPUnit::assertEquals(
-                $this->headers->get($headerName), $value,
+                $value, $this->headers->get($headerName),
                 "Header [{$headerName}] was found, but value [{$actual}] does not match [{$value}]."
             );
         }
diff --git a/tests/Foundation/FoundationTestResponseTest.php b/tests/Foundation/FoundationTestResponseTest.php
index c6eaef310dae..f7ced8e81f57 100644
--- a/tests/Foundation/FoundationTestResponseTest.php
+++ b/tests/Foundation/FoundationTestResponseTest.php
@@ -39,6 +39,22 @@ public function testAssertSeeText()
         $response->assertSeeText('foobar');
     }
 
+    public function testAssertHeader()
+    {
+        $baseResponse = tap(new Response, function ($response) {
+            $response->header('Location', '/foo');
+        });
+
+        $response = TestResponse::fromBaseResponse($baseResponse);
+
+        try {
+            $response->assertHeader('Location', '/bar');
+        } catch (\PHPUnit_Framework_ExpectationFailedException $e) {
+            $this->assertEquals('/bar', $e->getComparisonFailure()->getExpected());
+            $this->assertEquals('/foo', $e->getComparisonFailure()->getActual());
+        }
+    }
+
     public function testAssertJsonWithArray()
     {
         $response = TestResponse::fromBaseResponse(new Response(new JsonSerializableSingleResourceStub));