diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eabd9d9..0c942af 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ on:
     tags: '*'
 jobs:
   test:
-    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }}${{ matrix.juliasyntaxvendored && ' - julia vendored JuliaSyntax' || '' }} - ${{ github.event_name }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -22,6 +22,8 @@ jobs:
           - ubuntu-latest
         arch:
           - x64
+        juliasyntaxvendored:
+          - false
         include:
           - version: '1'
             os: ubuntu-latest
@@ -35,12 +37,19 @@ jobs:
           - version: '1'
             os: macos-latest
             arch: x64
+          - version: '1'
+            os: ubuntu-latest
+            arch: x64
+            juliasyntaxvendored: true
     steps:
       - uses: actions/checkout@v6
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
+      - name: Use JuliaSyntax from julia master
+        if: matrix.juliasyntaxvendored
+        run: julia --project -e 'using Pkg; Pkg.add(url="https://github.com/JuliaLang/julia.git", subdir="JuliaSyntax")'
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
diff --git a/Project.toml b/Project.toml
index b54aaca..347edd9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -8,7 +8,7 @@ JuliaSyntax = "70703baa-626e-46a2-a12c-08ffd08c73b4"
 TOML = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
 
 [compat]
-JuliaSyntax = "1"
+JuliaSyntax = "1,2"
 TOML = "1"
 julia = "1.10"