diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c81ed63..94fd33a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,3 +9,22 @@ on:
 jobs:
   unit-tests:
      uses: vapor/ci/.github/workflows/run-unit-tests.yml@main
+
+  unit-tests-old:
+    if: ${{ !(github.event.pull_request.draft || false) }}
+    strategy:
+      fail-fast: false
+      matrix:
+        swift-image:
+          - swift:5.5-focal
+          - swift:5.6-focal
+          - swift:5.7-jammy
+    runs-on: ubuntu-latest
+    container: ${{ matrix.swift-image }}
+    timeout-minutes: 60
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+      - name: Run unit tests
+        run: SWIFT_DETERMINISTIC_HASHING=1 swift test --sanitize=thread
+    
\ No newline at end of file
diff --git a/Package.swift b/Package.swift
index 93d867e..bb64407 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.7
+// swift-tools-version:5.5
 import PackageDescription
 
 let package = Package(