diff --git a/tests/e2e/etcd_config_test.go b/tests/e2e/etcd_config_test.go
index 23240611171..b9b1a51bdca 100644
--- a/tests/e2e/etcd_config_test.go
+++ b/tests/e2e/etcd_config_test.go
@@ -449,4 +449,6 @@ func TestEtcdTLSVersion(t *testing.T) {
 	assert.NoError(t, e2e.WaitReadyExpectProc(context.TODO(), proc, e2e.EtcdServerReadyLines), "did not receive expected output from etcd process")
 	assert.NoError(t, proc.Stop())
 
+	proc.Wait() // ensure the port has been released
+	proc.Close()
 }