diff --git a/src/test/multiRoot/extension.test.ts b/src/test/multiRoot/extension.test.ts
index c1ed247..2c1a6d4 100644
--- a/src/test/multiRoot/extension.test.ts
+++ b/src/test/multiRoot/extension.test.ts
@@ -232,7 +232,7 @@ suite("Multi root workspace tests", () => {
   }).timeout(30000);
 
   test("extension starts first client on the same folder with mix.exs if useCurrentRootFolderAsProjectDir is true", async () => {
-    vscode.workspace
+    await vscode.workspace
       .getConfiguration("elixirLS")
       .update(
         "useCurrentRootFolderAsProjectDir",