diff --git a/.github/workflows/test-dart-sass-v1.yml b/.github/workflows/test-dart-sass-v1.yml
index 6509f1528..528b987ca 100644
--- a/.github/workflows/test-dart-sass-v1.yml
+++ b/.github/workflows/test-dart-sass-v1.yml
@@ -18,6 +18,19 @@ jobs:
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
+      - if: matrix.os == 'ubuntu-latest'
+        name: Free Disk Space (Ubuntu)
+        uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be
+        with:
+          # this might remove tools that are actually needed,
+          # if set to "true" but frees about 6 GB
+          tool-cache: false
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: true
+          docker-images: true
+          swap-storage: true
       - name: Checkout code
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       - name: Install Go
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bee804305..734411b35 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,6 +20,19 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
+      - if: matrix.os == 'ubuntu-latest'
+        name: Free Disk Space (Ubuntu)
+        uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be
+        with:
+          # this might remove tools that are actually needed,
+          # if set to "true" but frees about 6 GB
+          tool-cache: false
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: true
+          docker-images: true
+          swap-storage: true
       - name: Checkout code
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       - name: Install Go