@@ -54,18 +54,14 @@ func TestTestData(t *testing.T) {

 		if err != nil {

 			t.Fatalf("Dockerfile missing for %s: %s", dir.Name(), err.Error())

 		}

-

-		rf, err := os.Open(resultfile)

-		if err != nil {

-			t.Fatalf("Result file missing for %s: %s", dir.Name(), err.Error())

-		}

+		defer df.Close()

 		ast, err := Parse(df)

 		if err != nil {

 			t.Fatalf("Error parsing %s's dockerfile: %s", dir.Name(), err.Error())

 		}

-		content, err := ioutil.ReadAll(rf)

+		content, err := ioutil.ReadFile(resultfile)

 		if err != nil {

 			t.Fatalf("Error reading %s's result file: %s", dir.Name(), err.Error())

 		}

@@ -75,8 +71,5 @@ func TestTestData(t *testing.T) {

 			fmt.Fprintln(os.Stderr, "Expected:\n"+string(content))

 			t.Fatalf("%s: AST dump of dockerfile does not match result", dir.Name())

 		}

-

-		df.Close()

-		rf.Close()

 	}

 }