diff --git a/hrp/internal/convert/converter_har_test.go b/hrp/internal/convert/converter_har_test.go
index 0d4daa11..af94c98c 100644
--- a/hrp/internal/convert/converter_har_test.go
+++ b/hrp/internal/convert/converter_har_test.go
@@ -118,7 +118,7 @@ func TestMakeTestCaseFromHAR(t *testing.T) {
 	if !assert.Equal(t, map[string]interface{}{"foo1": "HDnY8", "foo2": 12.3}, tCase.TestSteps[1].Request.Body) {
 		t.Fatal()
 	}
-	if !assert.Equal(t, "foo1=HDnY8&foo2=12.3", tCase.TestSteps[2].Request.Body) {
+	if !assert.Equal(t, map[string]string{"foo1": "HDnY8", "foo2": "12.3"}, tCase.TestSteps[2].Request.Body) {
 		t.Fatal()
 	}
 
@@ -264,7 +264,7 @@ func TestMakeRequestDataParams(t *testing.T) {
 		t.Fatal()
 	}
 
-	if !assert.Equal(t, "a=1&b=2", step.Request.Body) {
+	if !assert.Equal(t, map[string]string{"a": "1", "b": "2"}, step.Request.Body) {
 		t.Fatal()
 	}
 }
diff --git a/hrp/step_request.go b/hrp/step_request.go
index 39e15d74..28b174ce 100644
--- a/hrp/step_request.go
+++ b/hrp/step_request.go
@@ -145,7 +145,10 @@ func (r *requestBuilder) prepareUrlParams(stepVariables map[string]interface{})
 		log.Error().Err(err).Msg("parse request url failed")
 		return err
 	}
-	baseURL := stepVariables["base_url"].(string)
+	var baseURL string
+	if stepVariables["base_url"] != nil {
+		baseURL = stepVariables["base_url"].(string)
+	}
 	rawUrl := buildURL(baseURL, convertString(requestUrl))
 
 	// prepare request params