diff --git a/ui-tests/.yarnrc.yml b/ui-tests/.yarnrc.yml
deleted file mode 100644
index 5459921..0000000
--- a/ui-tests/.yarnrc.yml
+++ /dev/null
@@ -1 +0,0 @@
-enableImmutableInstalls: false
diff --git a/ui-tests/package.json b/ui-tests/package.json
index e8264e8..58daae7 100644
--- a/ui-tests/package.json
+++ b/ui-tests/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "start": "jupyter lab --config jupyter_server_test_config.py",
     "test": "jlpm playwright test",
-    "test:update": "jlpm playwright test --update-snapshots"
+    "test:update": "YARN_ENABLE_IMMUTABLE_INSTALLS=false jlpm playwright test --update-snapshots"
   },
   "devDependencies": {
     "@jupyterlab/galata": "^5.0.5",