diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index dd5153d..ee4c4a3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -99,7 +99,7 @@ jobs:
     - name: Test
       if: ${{ matrix.build-only != 'yes' }}
       working-directory: ${{github.workspace}}/build
-      run: ctest --output-on-failure -j 4 -C ${{ matrix.build-type }}
+      run: ctest --output-on-failure -j 4 -C ${{ matrix.build-type }} --timeout 400
     - name: Selfhost
       if: ${{ matrix.self-host }}
       working-directory: ${{github.workspace}}/build
@@ -182,7 +182,7 @@ jobs:
     # QEMU)
     - name: Test
       working-directory: ${{github.workspace}}/build
-      run: ctest --output-on-failure -E '(perf-.*)|(.*-malloc$)'
+      run: ctest --output-on-failure -E '(perf-.*)|(.*-malloc$)' --timeout 400
       timeout-minutes: 30
 
   windows:
@@ -222,7 +222,7 @@ jobs:
       # Run the tests.
     - name: Test
       working-directory: ${{ github.workspace }}/build
-      run: ctest -j 2 --interactive-debug-mode 0 --output-on-failure -C ${{ matrix.build-type }}
+      run: ctest -j 2 --interactive-debug-mode 0 --output-on-failure -C ${{ matrix.build-type }} --timeout 400
       timeout-minutes: 20