diff --git a/convert.go b/convert.go
index add6e415..66cfd343 100644
--- a/convert.go
+++ b/convert.go
@@ -102,3 +102,23 @@ func loadFromYAML(path string) (*TCase, error) {
 	err = yaml.Unmarshal(file, tc)
 	return tc, err
 }
+
+func convertTestCase(tc *TCase) (*TestCase, error) {
+	testCase := &TestCase{
+		Config: tc.Config,
+	}
+	for _, step := range tc.TestSteps {
+		if step.Request != nil {
+			testCase.TestSteps = append(testCase.TestSteps, &requestWithOptionalArgs{
+				step: step,
+			})
+		} else if step.TestCase != nil {
+			testCase.TestSteps = append(testCase.TestSteps, &testcaseWithOptionalArgs{
+				step: step,
+			})
+		} else {
+			log.Printf("[convertTestCase] unexpected step: %+v", step)
+		}
+	}
+	return testCase, nil
+}
diff --git a/convert_test.go b/convert_test.go
index 88622cbe..eaad39d2 100644
--- a/convert_test.go
+++ b/convert_test.go
@@ -96,3 +96,19 @@ func TestDumpAndLoadYAML(t *testing.T) {
 		t.Fail()
 	}
 }
+
+func TestLoadJSONAndRun(t *testing.T) {
+	jsonPath := "demo.json"
+	tc, err := loadFromJSON(jsonPath)
+	if !assert.NoError(t, err) {
+		t.Fail()
+	}
+	testcase, err := convertTestCase(tc)
+	if !assert.NoError(t, err) {
+		t.Fail()
+	}
+	err = Test(t, testcase)
+	if err != nil {
+		t.Fatalf("run testcase error: %v", err)
+	}
+}