diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d7dbc99..5fc0e73 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -12,7 +12,7 @@ on:
 
 defaults:
   run:
-    shell: bash -l {0}
+    shell: bash -uleo pipefail {0}
 
 jobs:
   test:
diff --git a/.github/workflows/canary.yaml b/.github/workflows/canary.yaml
index 94a3bd0..0bf2c27 100644
--- a/.github/workflows/canary.yaml
+++ b/.github/workflows/canary.yaml
@@ -8,6 +8,10 @@ on:
     branches:
       - "main"
 
+defaults:
+  run:
+    shell: bash -uleo pipefail {0}
+
 jobs:
   test:
     name: Canary tests on ${{ matrix.cfg.os }}, Python ${{ matrix.python-version }}