diff --git a/server/etcdmain/config_test.go b/server/etcdmain/config_test.go
index 1a15e20c0ae..8c77bce8c10 100644
--- a/server/etcdmain/config_test.go
+++ b/server/etcdmain/config_test.go
@@ -790,17 +790,9 @@ enable-distributed-tracing: true
 			cfg := newConfig()
 
 			if tc.yamlConfig != "" {
-				tmpfile, err := os.CreateTemp("", "etcd-test-*.yaml")
-				if err != nil {
-					t.Fatal(err)
-				}
+				tmpfile := mustCreateCfgFile(t, []byte(tc.yamlConfig))
 				defer os.Remove(tmpfile.Name())
 
-				err = os.WriteFile(tmpfile.Name(), []byte(tc.yamlConfig), 0600)
-				if err != nil {
-					t.Fatal(err)
-				}
-
 				tc.args = []string{"--config-file=" + tmpfile.Name()}
 			}