diff --git a/.github/workflows/vsix-build.yml b/.github/workflows/vsix-build.yml
index f69f582..21a7572 100644
--- a/.github/workflows/vsix-build.yml
+++ b/.github/workflows/vsix-build.yml
@@ -7,6 +7,11 @@ on:
         description: 'The extension name (e.g., BreakpointNotifier, OpenBinFolder)'
         required: true
         type: string
+      test-project:
+        description: 'Optional path to a test project or solution to run after the build. Tests are skipped when empty.'
+        required: false
+        type: string
+        default: ''
     secrets:
       HONEYCOMB_API_KEY:
         description: 'Honeycomb API key (optional, only used if HoneycombConfig.cs exists)'
@@ -48,13 +53,20 @@ jobs:
     - name: 3. Build Project
       run: dotnet build ${{ env.PROJECT_PATH }} -c Release -p:SetVsixVersion=${{ steps.version.outputs.version }}
 
-    - name: 4. Create Information File
+    # Runs in the same job so the build above is reused. SetVsixVersion must match the build
+    # step exactly: MSBuild treats differing global properties as a different project instance
+    # and would rebuild the extension from scratch.
+    - name: 4. Run Tests
+      if: inputs.test-project != ''
+      run: dotnet test ${{ inputs.test-project }} -c Release -p:SetVsixVersion=${{ steps.version.outputs.version }}
+
+    - name: 5. Create Information File
       uses: jsdaniell/create-json@v1.2.3
       with:
         name: '${{ env.OUTPUT_PATH }}/${{ env.INFO_FILE }}'
         json: '{"sha":"${{ github.sha }}", "version":"${{ steps.version.outputs.version }}"}'
 
-    - name: 5. Upload Artifact
+    - name: 6. Upload Artifact
       uses: actions/upload-artifact@v4
       with:
         path: |