diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7e8fa0b..207131c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,7 @@ on:
       - "scripts/diff_to_tbl.luau"
       - "scripts/test_runner.luau"
       - "scripts/depgraph.luau"
+      - "scripts/mock/**"
       - "testkit.luau"
   pull_request:
     branches: [ main ]
@@ -16,13 +17,12 @@ on:
       - "scripts/test_runner.luau"
       - "scripts/depgraph.luau"
       - "testkit.luau"
+      - "scripts/mock/**"
 
 jobs:
   Main:    
     runs-on: ${{ matrix.runner-os }}
     name: ${{ matrix.name }}
-    env:
-      GH_TOKEN: ${{ github.token }}
     strategy:
       fail-fast: false
       matrix:
@@ -38,20 +38,26 @@ jobs:
         
     steps:
       - uses: CompeyDev/setup-rokit@v0.1.0
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: ${{ github.event_name == 'pull_request' && 2 || 0 }}
 
       - name: Install Toolchain
         run: rokit install --no-trust-check
 
-      - name: Fetch diff
-        id: fetch_diff
-        shell: bash
+      - name: Fetch Diff
         run: |
-          if [ "${{ github.event_name }}" == "pull_request" ]; then
-            echo "diff=(gh pr diff ${{ github.event.pull_request.number }})" >> .diff
-          else
-            echo "diff=$(gh api repos/${{ github.repository }}/commits/${{ github.sha }} --header 'Accept: application/vnd.github.v3.diff')" >> .diff
-          fi
+          case '${{ github.event_name }}' in
+            push)
+              firstCommit='${{ github.event.commits[0].id }}'
+              lastCommit='${{ github.event.commits[-1].id }}'
+              ;;
+            pull_request)
+              firstCommit='${{ github.event.base_ref }}'
+              lastCommit='${{ github.event.head_ref }}'
+              ;;
+          esac
+          echo "diff=$(git diff --name-only --diff-filter=d "${firstCommit}~1" "${lastCommit}")" >> .diff
 
       - name: Run test runner
         run: lune run scripts/test_runner
diff --git a/scripts/diff_reader.luau b/scripts/diff_reader.luau
index 01bb37a..fe11bf9 100644
--- a/scripts/diff_reader.luau
+++ b/scripts/diff_reader.luau
@@ -15,6 +15,8 @@ local LIB_FILENAME_BLACKLIST = table.freeze({
 local GMATCH = string.gmatch
 local diff_reader = {}
 
+print(DEFAULT_DIFF)
+
 function diff_reader.libs(diff: string?): ({ string }, { [string]: boolean })
 	local diff = diff or DEFAULT_DIFF
 	local changed_array = {}