diff --git a/.github/workflows/run-integration-tests.yml b/.github/workflows/run-integration-tests.yml
index 42398edae..16a43cafe 100644
--- a/.github/workflows/run-integration-tests.yml
+++ b/.github/workflows/run-integration-tests.yml
@@ -46,7 +46,7 @@ jobs:
               with:
                   php-version: ${{ matrix.php }}
                   coverage: none
-                  extensions: none
+                  extensions: mbstring
               env:
                   debug: true