diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index de244842..9cef1028 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-24.04
diff --git a/.github/workflows/release-gui.yml b/.github/workflows/release-gui.yml
index 3609b6c5..a848962f 100644
--- a/.github/workflows/release-gui.yml
+++ b/.github/workflows/release-gui.yml
@@ -23,7 +23,7 @@ permissions:
 jobs:
   build-gui:
     strategy:
-      fail-fast: false
+      fail-fast: true
       matrix:
         include:
           - platform: 'macos-14'
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 56925a9c..cd124f4f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,6 +5,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-24.04