diff --git a/backend/plugins/sonarqube/api/connection_api.go b/backend/plugins/sonarqube/api/connection_api.go
index 29f26370cf4..9058ce3f7e8 100644
--- a/backend/plugins/sonarqube/api/connection_api.go
+++ b/backend/plugins/sonarqube/api/connection_api.go
@@ -19,6 +19,7 @@ package api
 
 import (
 	"context"
+	"fmt"
 	"net/http"
 
 	"github.com/apache/incubator-devlake/core/errors"
@@ -95,6 +96,10 @@ func TestConnection(input *plugin.ApiResourceInput) (*plugin.ApiResourceOutput,
 	if testConnectionErr != nil {
 		return nil, plugin.WrapTestConnectionErrResp(basicRes, testConnectionErr)
 	}
+	if testConnectionResult.Status != http.StatusOK {
+		errMsg := fmt.Sprintf("Test connection fail, unexpected status code: %d", testConnectionResult.Status)
+		return nil, plugin.WrapTestConnectionErrResp(basicRes, errors.Default.New(errMsg))
+	}
 	return &plugin.ApiResourceOutput{Body: testConnectionResult, Status: http.StatusOK}, nil
 }
 
@@ -116,6 +121,10 @@ func TestExistingConnection(input *plugin.ApiResourceInput) (*plugin.ApiResource
 	if testConnectionErr != nil {
 		return nil, plugin.WrapTestConnectionErrResp(basicRes, testConnectionErr)
 	}
+	if testConnectionResult.Status != http.StatusOK {
+		errMsg := fmt.Sprintf("Test connection fail, unexpected status code: %d", testConnectionResult.Status)
+		return nil, plugin.WrapTestConnectionErrResp(basicRes, errors.Default.New(errMsg))
+	}
 	return &plugin.ApiResourceOutput{Body: testConnectionResult, Status: http.StatusOK}, nil
 }