diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 54f707e..4bb1b75 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -14,6 +14,6 @@ jobs:
       - name: Build
         run: cargo build --verbose
       - name: Run tests
-        run: cargo test --verbose
+        run: cargo test --verbose -- --test-threads 1
       - name: Clippy
         run: cargo clippy
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index fb5b1d2..8d73058 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -14,6 +14,6 @@ jobs:
       - name: Build
         run: cargo build --verbose
       - name: Run tests
-        run: cargo test --verbose
+        run: cargo test --verbose -- --test-threads 1
       - name: Clippy
         run: cargo clippy