diff --git a/.github/workflows/CICD.yml b/.github/workflows/CICD.yml
index b1b8dca54..cf12ee2d7 100644
--- a/.github/workflows/CICD.yml
+++ b/.github/workflows/CICD.yml
@@ -20,6 +20,11 @@ on: [push, pull_request]
 permissions:
   contents: read # to fetch code (actions/checkout)
 
+# End the current execution if there is a new changeset in the PR.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
 jobs:
   cargo-deny:
     name: Style/cargo-deny
diff --git a/.github/workflows/GnuTests.yml b/.github/workflows/GnuTests.yml
index a462b946a..61da457ed 100644
--- a/.github/workflows/GnuTests.yml
+++ b/.github/workflows/GnuTests.yml
@@ -14,6 +14,11 @@ on: [push, pull_request]
 permissions:
   contents: read
 
+# End the current execution if there is a new changeset in the PR.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
 jobs:
   gnu:
     permissions: