diff --git a/src/phpunittest.ts b/src/phpunittest.ts
index 9b66e05..f8a4852 100644
--- a/src/phpunittest.ts
+++ b/src/phpunittest.ts
@@ -331,6 +331,7 @@ export class TestRunner {
       const spawnResult = await new Promise((r) =>
         r(
           spawnSync(runConfig.exec, runConfig.args, {
+            cwd: argBuilder.workspaceFolder,
             encoding: "utf8",
           }),
         ),