diff --git a/.github/workflows/os-49-vm-validation.yml b/.github/workflows/os-49-vm-validation.yml
index ca020de3f..c78810534 100644
--- a/.github/workflows/os-49-vm-validation.yml
+++ b/.github/workflows/os-49-vm-validation.yml
@@ -10,6 +10,10 @@ permissions:
   contents: read
   packages: read
 
+defaults:
+  run:
+    shell: bash
+
 jobs:
   vm-boot:
     name: "VM boot (${{ matrix.name }})"