diff --git a/.github/workflows/README.md b/.github/workflows/README.md
new file mode 100644
index 0000000..3cebc4c
--- /dev/null
+++ b/.github/workflows/README.md
@@ -0,0 +1,9 @@
+The testing workflow is divided into three parts:
+ - `test-build.yml` is run on `ubuntu-latest` and contains source-related checks:
+ linters, formatters and verifying whether the sources match dist/ directory.
+ - `test-action.yml` contains simple, general integration tests of the action
+ that should be run on each platform.
+ - `test-inputs.yml` is run on `ubuntu-latest` and contains specific integration
+ tests checking whether the action inputs are processed properly.
+
+`setup-test-workspace` is a helper action that creates a workspace containing two crates: the test fork of `ref_slice` and a dummy crate that has no matching baseline version on `crates.io`.
diff --git a/.github/workflows/setup-test-workspace/action.yml b/.github/workflows/setup-test-workspace/action.yml
index 8496958..7497e06 100644
--- a/.github/workflows/setup-test-workspace/action.yml
+++ b/.github/workflows/setup-test-workspace/action.yml
@@ -1,4 +1,9 @@
 name: Setup test workspace
+inputs:
+  ref-slice-ref:
+    description: 'Reference of the ref_slice to checkout'
+    required: false
+    default: ''
 runs:
   using: 'composite'
   steps:
@@ -6,7 +11,7 @@ runs:
         uses: actions/checkout@v3
         with:
           repository: mgr0dzicki/cargo-semver-action-ref-slice
-          fetch-depth: 0
+          ref: ${{ inputs.ref-slice-ref }}
           persist-credentials: true
           path: ref_slice
       - name: Create dummy crate
diff --git a/.github/workflows/test-action.yml b/.github/workflows/test-action.yml
index 5159abd..2c1ba31 100644
--- a/.github/workflows/test-action.yml
+++ b/.github/workflows/test-action.yml
@@ -23,22 +23,22 @@ jobs:
     name: Run tests
     runs-on: ${{ inputs.runs-on }}
     steps:
-      - name: Checkout the test repository
+      - name: Checkout the test repository and test with patch change and patch version bump
         uses: actions/checkout@v3
         with:
           repository: mgr0dzicki/cargo-semver-action-ref-slice
-          fetch-depth: 0
+          ref: patch_change
           persist-credentials: true
       - name: Checkout the action
         uses: actions/checkout@v3
         with:
           path: action
-      - name: Checkout the test with patch change and patch version bump
-        run: git checkout patch_change
       - name: Run the action
         uses: ./action/
       - name: Checkout the test with major change and patch version bump
-        run: git checkout major_change
+        run: |
+          git fetch origin major_change
+          git checkout major_change
       - name: Run the action (allowed to fail)
         id: action_major
         uses: ./action/
diff --git a/.github/workflows/test-inputs.yml b/.github/workflows/test-inputs.yml
index 6531706..dfa3651 100644
--- a/.github/workflows/test-inputs.yml
+++ b/.github/workflows/test-inputs.yml
@@ -15,20 +15,18 @@ env:
   CARGO_TERM_COLOR: always
 
 jobs:
-  test-package:
-    name: Test input package
+  test-package-patch:
+    name: Test input package (patch change)
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the action
         uses: actions/checkout@v3
         with:
           path: action
-      - name: Setup the workspace
+      - name: Setup the workspace with ref_slice patch change
         uses: ./action/.github/workflows/setup-test-workspace
-      - name: Checkout the test with patch change and patch version bump
-        run: |
-          cd ref_slice
-          git checkout patch_change
+        with:
+          ref-slice-ref: patch_change
       - name: Run the action on ref_slice patch change
         uses: ./action/
         with:
@@ -42,10 +40,19 @@ jobs:
         run: |
           echo "Error! The action should have failed because of checking the dummy crate, but it has not!"
           exit 1
-      - name: Checkout the test with major change and patch version bump
-        run: |
-          cd ref_slice
-          git checkout major_change
+
+  test-package-major:
+    name: Test input package (major change)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the action
+        uses: actions/checkout@v3
+        with:
+          path: action
+      - name: Setup the workspace with ref_slice major change
+        uses: ./action/.github/workflows/setup-test-workspace
+        with:
+          ref-slice-ref: major_change
       - name: Run the action on ref_slice major change (allowed to fail)
         id: action_major
         uses: ./action/
@@ -79,20 +86,18 @@ jobs:
         with:
           verbose: true
 
-  test-manifest-path:
-    name: Test input manifest-path
+  test-manifest-path-patch:
+    name: Test input manifest-path (patch change)
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the action
         uses: actions/checkout@v3
         with:
           path: action
-      - name: Setup the workspace
+      - name: Setup the workspace with ref_slice patch change
         uses: ./action/.github/workflows/setup-test-workspace
-      - name: Checkout the test with patch change and patch version bump
-        run: |
-          cd ref_slice
-          git checkout patch_change
+        with:
+          ref-slice-ref: patch_change
       - name: Run the action on ref_slice patch change (Cargo.toml path)
         uses: ./action/
         with:
@@ -112,10 +117,19 @@ jobs:
         run: |
           echo "Error! The action should have failed because of checking the dummy crate, but it has not!"
           exit 1
-      - name: Checkout the test with major change and patch version bump
-        run: |
-          cd ref_slice
-          git checkout major_change
+
+  test-manifest-path-major:
+    name: Test input manifest-path (major change)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the action
+        uses: actions/checkout@v3
+        with:
+          path: action
+      - name: Setup the workspace with ref_slice major change
+        uses: ./action/.github/workflows/setup-test-workspace
+        with:
+          ref-slice-ref: major_change
       - name: Run the action on ref_slice major change (Cargo.toml path, allowed to fail)
         id: action_major_cargo_toml
         uses: ./action/