diff --git a/.github/workflows/bench.yml b/.github/workflows/bench.yml
index 48930e1eb1..9213a22c2c 100644
--- a/.github/workflows/bench.yml
+++ b/.github/workflows/bench.yml
@@ -1,5 +1,10 @@
 name: Benchmark
 
+# See: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#concurrency.
+concurrency:
+  group: ${{ github.head_ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
 on:
   pull_request:
     branches:
@@ -14,7 +19,7 @@ jobs:
       - id: skip_check
         uses: fkirc/skip-duplicate-actions@v3.4.0
         with:
-          cancel_others: true
+          cancel_others: false
           paths_ignore: '["**/docs/**", "**.md", "**/LICENSE", ".circleci/**", "install/**", "**.nix", "**/test/**", "flake.lock", "**/README.md", "FUNDING.yml"]'
 
   bench_init:
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index dce5f9083b..7312cef262 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -1,5 +1,10 @@
 name: Nix
 
+# See: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#concurrency.
+concurrency:
+  group: ${{ github.head_ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
 on:
   pull_request:
     branches:
@@ -18,7 +23,7 @@ jobs:
       - id: skip_check
         uses: fkirc/skip-duplicate-actions@master
         with:
-          cancel_others: true
+          cancel_others: false
           paths_ignore: '["**/docs/**", "**.md", "**/LICENSE", ".circleci/**", "install/**", "**/README.md", "FUNDING.yml"]'
       - id: skip_check_no_nix
         uses: fkirc/skip-duplicate-actions@master
diff --git a/test/functional/Main.hs b/test/functional/Main.hs
index c8c1651701..da12500f7f 100644
--- a/test/functional/Main.hs
+++ b/test/functional/Main.hs
@@ -28,7 +28,7 @@ main = defaultTestRunner
             , Deferred.tests
             , Definition.tests
             , Diagnostic.tests
-            , Format.tests
+            , ignoreInEnv [HostOS Windows, GhcVer GHC90] "Tests gets stuck in ci" $ Format.tests
             , FunctionalBadProject.tests
             , FunctionalCodeAction.tests
             , FunctionalLiquid.tests