diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c0213be..313ced0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
   check-tests:
     permissions:
       pull-requests: read
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     outputs:
       needed: ${{ steps.filter.outputs.changed }}
     steps:
diff --git a/psalm.xml b/psalm.xml
index 7d0fc1c..ca8d46e 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -9,6 +9,7 @@
     findUnusedCode="true"
     allowStringToStandInForClass="true"
     findUnusedPsalmSuppress="true"
+    noCache="true"
 >
     <projectFiles>
         <directory name="src" />
diff --git a/src/MultiRunner.php b/src/MultiRunner.php
index 801ba79..df738d1 100644
--- a/src/MultiRunner.php
+++ b/src/MultiRunner.php
@@ -515,8 +515,7 @@ protected function justRunAndForget(): void
     protected function canProcessesRunViaPopen(): bool
     {
         foreach ($this->processesQueue as $processParams) {
-            /* @phpstan-ignore booleanAnd.rightAlwaysTrue */
-            if (isset($processParams->cwd) && is_string($processParams->cwd) && strlen(trim($processParams->cwd)) > 0) {
+            if (isset($processParams->cwd) && strlen(trim($processParams->cwd)) > 0) {
                 return false;
             }
             if (isset($processParams->envVars) && count($processParams->envVars) > 0) {