diff --git a/Makefile b/Makefile
index 88e33440..34c3fd47 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ COMMIT ?= $(shell git describe --match=NeVeRmAtCh --always --abbrev=40 --dirty)
 DEBUG ?=
 DOCKERPREFIX ?=
 BUILD_TAGS ?=
-LDFLAGS ?= 
+LDFLAGS ?=
 BUILDFLAGS ?= -gcflags '$(GCFLAGS)' -ldflags '$(LDFLAGS) -X main.Version=$(VERSION) -X main.Commit=$(COMMIT)' -tags '$(BUILD_TAGS)'
 ifneq ("$(DEBUG)", "")
 	BUILDFLAGS += -race
diff --git a/pkg/proxy/backend/backend_conn_mgr_test.go b/pkg/proxy/backend/backend_conn_mgr_test.go
index 89a267fe..000d9769 100644
--- a/pkg/proxy/backend/backend_conn_mgr_test.go
+++ b/pkg/proxy/backend/backend_conn_mgr_test.go
@@ -646,8 +646,9 @@ func TestGracefulCloseWhenActive(t *testing.T) {
 		{
 			proxy: func(_, _ *pnet.PacketIO) error {
 				ts.mp.GracefulClose()
-				time.Sleep(300 * time.Millisecond)
-				require.Equal(t, statusNotifyClose, ts.mp.closeStatus.Load())
+				require.Eventually(t, func() bool {
+					return statusNotifyClose == ts.mp.closeStatus.Load()
+				}, 300*time.Millisecond, 100*time.Millisecond)
 				return nil
 			},
 		},