diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4fa02a553..71027cd33 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -158,7 +158,8 @@ jobs:
       TOXENV: ${{ matrix.toxenv }}
 
     runs-on: ${{ matrix.os }}
-    timeout-minutes: 120
+    # macOS machines can be slow, if overloaded.
+    timeout-minutes: 360
 
     steps:
     - uses: actions/checkout@v4