diff --git a/.github/workflows/artifacts.yml b/.github/workflows/artifacts.yml
index fe7b6f04..b5cdd0da 100644
--- a/.github/workflows/artifacts.yml
+++ b/.github/workflows/artifacts.yml
@@ -5,6 +5,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   python_doc:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3ab86245..ab49582b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,6 +10,10 @@ on:
   schedule:
     - cron: "0 0 * * 0"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   fmt:
     runs-on: ubuntu-latest