diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6e20b99..1a72cd0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -132,11 +132,19 @@ jobs:
       uses: py-actions/py-dependency-install@v3
       with:
         path: "requirements.txt"
+    - name: Install node
+      uses: actions/setup-node@v3
+      with:
+        node-version: 20.9.0
+    - name: Install browserify
+      run: npm install -g browserify
     - name: Setup EMSDK
       uses: mymindstorm/setup-emsdk@v11
       with:
         version: 3.1.44
-    - name: Use local djinni djinni
+    - name: Install chrome
+      uses: browser-actions/setup-chrome@latest
+    - name: Use local djinni on branch for now
       if: ${{ github.ref != 'refs/heads/master' }}
       run: export CMAKE_DJINNI_OPT="-DDJINNI_EXECUTABLE=$(pwd)/bin/djinni"
     - name: Report cmake version
@@ -145,7 +153,8 @@ jobs:
       run: cmake  -DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -S . -B build -DDJINNI_WITH_WASM=ON -DDJINNI_EXECUTABLE=$(pwd)/bin/djinni
     - name: Build release
       run: cmake --build build --parallel $(nproc) --config Release
-     
+    - name: Run headless test
+      run: pushd build && ctest --output-on-failure
 
   build-on-windows-for-cppcli:
     runs-on: windows-latest
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 4e7d0bb..c5dcaec 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -71,7 +71,6 @@ if(DJINNI_WITH_WASM)
     )
 
     set(WASM_CC_FLAGS "-s MAIN_MODULE=1 -fexceptions")
-    message(WARNING ${WASM_CC_FLAGS})
     set_target_properties(${DjinniTextsortWasm} PROPERTIES COMPILE_FLAGS ${WASM_CC_FLAGS})
     
     string(JOIN " " EMSCRIPTEN_LINK_OPTIONS
@@ -83,7 +82,6 @@ if(DJINNI_WITH_WASM)
     )
 
     set(WASM_LINK_FLAGS "${EMSCRIPTEN_LINK_OPTIONS} -fexceptions")
-    message(WARNING ${WASM_LINK_FLAGS})
     set_target_properties(${DjinniTextsortWasm} PROPERTIES LINK_FLAGS ${WASM_LINK_FLAGS})
     set(CMAKE_EXECUTABLE_SUFFIX ".js")
     
diff --git a/requirements.txt b/requirements.txt
index fc947f6..19d6b76 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 cffi==1.14.5
 future==0.18.2
 pytest==6.2.5
+selenium==4.15.2
diff --git a/test-suite/CMakeLists.txt b/test-suite/CMakeLists.txt
index fa918a6..c4480f8 100644
--- a/test-suite/CMakeLists.txt
+++ b/test-suite/CMakeLists.txt
@@ -240,7 +240,6 @@ if(DJINNI_WITH_WASM)
     )
 
     set(WASM_CC_FLAGS "-s MAIN_MODULE=1 -fexceptions")
-    message(WARNING ${WASM_CC_FLAGS})
     set_target_properties(${DjinniWasmTest} PROPERTIES COMPILE_FLAGS ${WASM_CC_FLAGS})
     
     string(JOIN " " EMSCRIPTEN_LINK_OPTIONS
@@ -252,7 +251,6 @@ if(DJINNI_WITH_WASM)
     )
 
     set(WASM_LINK_FLAGS "${EMSCRIPTEN_LINK_OPTIONS} -fexceptions")
-    message(WARNING ${WASM_LINK_FLAGS})
     set_target_properties(${DjinniWasmTest} PROPERTIES LINK_FLAGS ${WASM_LINK_FLAGS})
     set(CMAKE_EXECUTABLE_SUFFIX ".js")
     
diff --git a/test-suite/handwritten-src/ts/run-tests-selenium.py b/test-suite/handwritten-src/ts/run-tests-selenium.py
index f97bb30..76c4643 100755
--- a/test-suite/handwritten-src/ts/run-tests-selenium.py
+++ b/test-suite/handwritten-src/ts/run-tests-selenium.py
@@ -7,7 +7,7 @@
 import sys
 import threading
 
-port = 8089
+port = "8080"
 httpd = HTTPServer(("127.0.0.1", int(port)), SimpleHTTPRequestHandler)
 
 def run_server():
@@ -19,16 +19,19 @@ def run_server():
 
 service = Service(executable_path=r'/usr/bin/chromedriver')
 options = webdriver.ChromeOptions()
-#options.add_argument('--headless')
+options.add_argument('--headless')
 options.add_argument('--no-sandbox')
 options.add_argument('--disable-dev-shm-usage')
 options.add_argument('--disable-gpu')
 driver = webdriver.Chrome(service=service, options=options)
 print(f"connecting web driver to http://localhost:{port}/")
 driver.get(f"http://localhost:{port}/test.html")
-#element = driver.find_element(By.NAME, "query")
-#assert element.is_enabled()
+failed_elements = driver.find_elements(By.XPATH, "//pre[@id='output']/span[contains(text(), 'FAILED')]")
+for element in failed_elements:
+    print(f"{element.text}", file=sys.stderr)
 driver.quit()
-finished_tests = True
 httpd.shutdown()
 server_thread.join()
+if len(failed_elements) > 0:
+    exit(1)
+exit(0)
diff --git a/test-suite/handwritten-src/ts/run.sh b/test-suite/handwritten-src/ts/run.sh
index 55cbef1..3d20f6c 100755
--- a/test-suite/handwritten-src/ts/run.sh
+++ b/test-suite/handwritten-src/ts/run.sh
@@ -1,6 +1,10 @@
 #! /usr/bin/env bash
+#! /usr/bin/env bash
 set -eu
+# compile TS
 tsc
+# bundle
 browserify main.js -o bundle.js
-sleep 1 && python3 -mwebbrowser http://localhost:8000/test.html &
-python3 -m http.server
+# then run the selenium tests
+sleep 1 && python3 run-tests-selenium.py
+