diff --git a/.github/workflows/mr_ci.yml b/.github/workflows/mr_ci.yml
index 11934fed..8ba9ae1f 100644
--- a/.github/workflows/mr_ci.yml
+++ b/.github/workflows/mr_ci.yml
@@ -6,6 +6,11 @@ on:
     branches:
       - main
 
+# Cancel existing tests on the same PR if a new commit is added to a pull request
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
 jobs:
 
   unit-tests:
diff --git a/.github/workflows/mr_ci_text_spotting.yml b/.github/workflows/mr_ci_text_spotting.yml
index 9b9c22a3..62602c6d 100644
--- a/.github/workflows/mr_ci_text_spotting.yml
+++ b/.github/workflows/mr_ci_text_spotting.yml
@@ -6,6 +6,11 @@ on:
     branches:
       - main
 
+# Cancel existing tests on the same PR if a new commit is added to a pull request
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
 # Run linter with github actions for quick feedbacks.
 jobs:
   all_tests: