diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8d6cefcf..e0ae77d2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -52,7 +52,7 @@ jobs:
     - run: yarn build
     - name: Install Nix
       uses: ./
-      with: 
+      with:
         nix_path: nixpkgs=channel:nixos-20.03
         extra_nix_config: |
           sandbox = relaxed
@@ -88,7 +88,7 @@ jobs:
     - run: yarn build
     - name: Install Nix
       uses: ./
-      with: 
+      with:
         nix_path: nixpkgs=channel:nixos-21.05
         install_url: https://nixos-nix-install-tests.cachix.org/serve/i6laym9jw3wg9mw6ncyrk6gjx4l34vvx/install
         install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
@@ -97,7 +97,7 @@ jobs:
   oldest-supported-installer:
     strategy:
         matrix:
-          os: [ubuntu-latest, macos-10.15]
+          os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3
@@ -107,10 +107,10 @@ jobs:
       uses: ./
       with:
         nix_path: nixpkgs=channel:nixos-21.05
-        install_url: https://releases.nixos.org/nix/nix-2.3.5/install
+        install_url: https://releases.nixos.org/nix/nix-2.3.8/install
     - run: nix-build test.nix
 
-  act-support: 
+  act-support:
     strategy:
         matrix:
           os: [ubuntu-latest]
@@ -122,4 +122,4 @@ jobs:
         go-version: '^1.16'
     - run: go install github.com/nektos/act@latest
     - run: docker pull ghcr.io/catthehacker/ubuntu:js-20.04
-    - run: ~/go/bin/act -P ubuntu-latest=ghcr.io/catthehacker/ubuntu:js-20.04 push -j simple-build 
+    - run: ~/go/bin/act -P ubuntu-latest=ghcr.io/catthehacker/ubuntu:js-20.04 push -j simple-build