diff --git a/.github/workflows/build-with-nix.yml b/.github/workflows/build-with-nix.yml
index 70f5ce80..7dd7cd34 100644
--- a/.github/workflows/build-with-nix.yml
+++ b/.github/workflows/build-with-nix.yml
@@ -24,15 +24,18 @@ jobs:
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
     - name: Build pytket-cutensornet
       run: nix build --accept-flake-config
-  test:
-    needs: build
-    runs-on: nixos-gpu
-    steps:
-    - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@V27
-    - uses: cachix/cachix-action@v15
-      with:
-        name: tket
-        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-    - name: Test pytket-cutensornet
-      run: nix run .#tests --accept-flake-config
+  #
+  # need GPU runners for this
+  #
+  #test:
+  #  needs: build
+  #  runs-on: nixos-gpu
+  #  steps:
+  #  - uses: actions/checkout@v4
+  #  - uses: cachix/install-nix-action@V27
+  #  - uses: cachix/cachix-action@v15
+  #    with:
+  #      name: tket
+  #      authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+  #  - name: Test pytket-cutensornet
+  #    run: nix run .#tests --accept-flake-config