diff --git a/cmd/explaintest/main.go b/cmd/explaintest/main.go
index ae4fa18d5a461..c81257feefb4c 100644
--- a/cmd/explaintest/main.go
+++ b/cmd/explaintest/main.go
@@ -425,6 +425,7 @@ func (t *tester) create(tableName string, qText string) error {
 	if err != nil {
 		return err
 	}
+	defer resp.Body.Close()
 
 	js, err := io.ReadAll(resp.Body)
 	if err != nil {
diff --git a/domain/infosync/info.go b/domain/infosync/info.go
index 8596dcc6ce477..faecff8d4a8af 100644
--- a/domain/infosync/info.go
+++ b/domain/infosync/info.go
@@ -333,6 +333,7 @@ func doRequest(ctx context.Context, addrs []string, route, method string, body i
 			}
 		})
 		if err == nil {
+			defer terror.Call(res.Body.Close)
 			bodyBytes, err := io.ReadAll(res.Body)
 			if err != nil {
 				return nil, err
@@ -344,7 +345,6 @@ func doRequest(ctx context.Context, addrs []string, route, method string, body i
 					bodyBytes = nil
 				}
 			}
-			terror.Log(res.Body.Close())
 			return bodyBytes, err
 		}
 	}
@@ -694,6 +694,8 @@ func (is *InfoSyncer) getPrometheusAddr() (string, error) {
 	if err != nil {
 		return "", err
 	}
+	defer terror.Call(resp.Body.Close)
+
 	var metricStorage metricStorage
 	dec := json.NewDecoder(resp.Body)
 	err = dec.Decode(&metricStorage)
diff --git a/executor/infoschema_reader.go b/executor/infoschema_reader.go
index b258665f688da..4817ec694277a 100644
--- a/executor/infoschema_reader.go
+++ b/executor/infoschema_reader.go
@@ -2264,11 +2264,13 @@ func (e *TiFlashSystemTableRetriever) initialize(sctx sessionctx.Context, tiflas
 					if err != nil {
 						return errors.Trace(err)
 					}
-					_, err = util.InternalHTTPClient().Do(req)
+					var r *http.Response
+					r, err = util.InternalHTTPClient().Do(req)
 					if err != nil {
 						sctx.GetSessionVars().StmtCtx.AppendWarning(err)
 						continue
 					}
+					defer terror.Call(r.Body.Close)
 					e.instanceInfos = append(e.instanceInfos, tiflashInstanceInfo{
 						id:  id,
 						url: url,