diff --git a/tests/entry_test.go b/tests/entry_test.go
index 7dd90a9..5eca10a 100644
--- a/tests/entry_test.go
+++ b/tests/entry_test.go
@@ -56,28 +56,43 @@ func Test_more_functionality(t *testing.T) {
 }
 
 func Test_obscure_functionality(t *testing.T) {
+	sourceFile := "../data/helloworld.c"
 	objectFile := "../data/bhello.notanextensionthatwerecognize"
-	args := []string{"../data/helloworld.c", "-c", "-o", objectFile}
+	exeFile := "../data/bhello"
+	opSys := runtime.GOOS
+	args := []string{sourceFile, "-c", "-o", objectFile}
 	exitCode := shared.Compile(args, "clang")
 	if exitCode != 0 {
 		t.Errorf("Compile of %v returned %v\n", args, exitCode)
 	} else {
 		fmt.Println("Compiled OK")
 	}
-	ok, err := shared.IsObjectFileForOS(objectFile, runtime.GOOS)
-	if !ok {
-		t.Errorf("isObjectFileForOS(%v, %v) = %v (err = %v)\n", objectFile, runtime.GOOS, ok, err)
+	ok, err := shared.IsObjectFileForOS(sourceFile, opSys)
+	if ok {
+		t.Errorf("isObjectFileForOS(%v, %v) = %v\n", sourceFile, opSys, ok)
 	} else {
-		fmt.Printf("isObjectFileForOS(%v, %v) = %v\n", objectFile, runtime.GOOS, ok)
+		fmt.Printf("isObjectFileForOS(%v, %v) = %v (err = %v)\n", sourceFile, opSys, ok, err)
 	}
-	args = []string{objectFile, "-o", "../data/bhello"}
+	ok, err = shared.IsObjectFileForOS(objectFile, opSys)
+	if !ok {
+		t.Errorf("isObjectFileForOS(%v, %v) = %v (err = %v)\n", objectFile, opSys, ok, err)
+	} else {
+		fmt.Printf("isObjectFileForOS(%v, %v) = %v\n", objectFile, opSys, ok)
+	}
+	args = []string{objectFile, "-o", exeFile}
 	exitCode = shared.Compile(args, "clang")
 	if exitCode != 0 {
 		t.Errorf("Compile of %v returned %v\n", args, exitCode)
 	} else {
 		fmt.Println("Compiled OK")
 	}
-	args = []string{"get-bc", "-v", "../data/bhello"}
+	ok, err = shared.IsObjectFileForOS(exeFile, opSys)
+	if ok {
+		t.Errorf("isObjectFileForOS(%v, %v) = %v\n", exeFile, opSys, ok)
+	} else {
+		fmt.Printf("isObjectFileForOS(%v, %v) = %v (err = %v)\n", exeFile, opSys, ok, err)
+	}
+	args = []string{"get-bc", "-v", exeFile}
 	exitCode = shared.Extract(args)
 	if exitCode != 0 {
 		t.Errorf("Extraction of %v returned %v\n", args, exitCode)