@@ -810,7 +810,7 @@ func fixManifestLayers(m *schema1.Manifest) error {

 	if imgs[len(imgs)-1].Parent != "" && runtime.GOOS != "windows" {

 		// Windows base layer can point to a base layer parent that is not in manifest.

-		return errors.New("Invalid parent ID in the base layer of the image.")

+		return errors.New("invalid parent ID in the base layer of the image")

 	}

 	// check general duplicates to error instead of a deadlock

@@ -80,7 +80,7 @@ func TestFixManifestLayersBaseLayerParent(t *testing.T) {

 		},

 	}

-	if err := fixManifestLayers(&duplicateLayerManifest); err == nil || !strings.Contains(err.Error(), "Invalid parent ID in the base layer of the image.") {

+	if err := fixManifestLayers(&duplicateLayerManifest); err == nil || !strings.Contains(err.Error(), "invalid parent ID in the base layer of the image") {

 		t.Fatalf("expected an invalid parent ID error from fixManifestLayers")

 	}

 }