diff --git a/builder/hyperv/iso/builder_test.go b/builder/hyperv/iso/builder_test.go
index ba167413b..383ab5b30 100644
--- a/builder/hyperv/iso/builder_test.go
+++ b/builder/hyperv/iso/builder_test.go
@@ -514,6 +514,6 @@ func TestUserVariablesInBootCommand(t *testing.T) {
 
 	ret := step.Run(state)
 	if ret != multistep.ActionContinue {
-		t.Fatalf("should not have error: %s", ret)
+		t.Fatalf("should not have error: %#v", ret)
 	}
 }
diff --git a/builder/hyperv/vmcx/builder_test.go b/builder/hyperv/vmcx/builder_test.go
index 89cac5878..fb7f35c52 100644
--- a/builder/hyperv/vmcx/builder_test.go
+++ b/builder/hyperv/vmcx/builder_test.go
@@ -535,6 +535,6 @@ func TestUserVariablesInBootCommand(t *testing.T) {
 
 	ret := step.Run(state)
 	if ret != multistep.ActionContinue {
-		t.Fatalf("should not have error: %s", ret)
+		t.Fatalf("should not have error: %#v", ret)
 	}
 }