diff --git a/run-tests.sh b/run-tests.sh
index c14075d..b2c0889 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -65,6 +65,58 @@ else
   echo "[SKIP] OCaml tests — binary not built (run: cd hosts/ocaml && dune build)"
 fi
 
+# -------------------------------------------------------------------
+# 4. OCaml bridge integration (custom special forms, web-forms.sx)
+# -------------------------------------------------------------------
+run_suite "OCaml bridge — custom special forms + web-forms" \
+  python3 -c "
+from shared.sx.ocaml_sync import OcamlSync
+bridge = OcamlSync()
+# Load exactly what the server does (no evaluator.sx!)
+for f in ['spec/parser.sx', 'spec/render.sx', 'web/adapter-html.sx', 'web/adapter-sx.sx', 'web/web-forms.sx', 'spec/freeze.sx']:
+    bridge.load(f)
+ok = 0; fail = 0
+def check(name, expr, expected=None):
+    global ok, fail
+    try:
+        r = bridge.eval(expr)
+        if expected is not None and r != expected:
+            print(f'  FAIL: {name}: expected {expected!r}, got {r!r}'); fail += 1
+        else:
+            print(f'  PASS: {name}'); ok += 1
+    except Exception as e:
+        print(f'  FAIL: {name}: {e}'); fail += 1
+
+# Custom special forms registered by web-forms.sx
+for form in ['defhandler', 'defquery', 'defaction', 'defpage', 'defrelation', 'defstyle', 'deftype', 'defeffect']:
+    check(f'{form} registered', f'(has-key? *custom-special-forms* \"{form}\")', 'true')
+
+# Custom forms callable via eval (not just via load)
+check('deftype via eval', '(deftype test-t number)', 'nil')
+check('defeffect via eval', '(defeffect test-e)', 'nil')
+check('defstyle via eval', '(defstyle my-s \"bold\")', 'bold')
+check('defhandler via eval', '(has-key? (defhandler test-h (&key x) x) \"__type\")', 'true')
+
+# Extension lists populated
+check('definition-form-extensions populated', '(> (len *definition-form-extensions*) 0)', 'true')
+check('RENDER_HTML_FORMS has defstyle', '(contains? RENDER_HTML_FORMS \"defstyle\")', 'true')
+
+print(f'\\nResults: {ok} passed, {fail} failed')
+import sys; sys.exit(1 if fail > 0 else 0)
+"
+
+# -------------------------------------------------------------------
+# 5. Python SX tests (post-removal regression, components, parser)
+# -------------------------------------------------------------------
+run_suite "Python — post-removal regression" \
+  python3 -m pytest shared/sx/tests/test_post_removal_bugs.py -v --tb=short
+
+run_suite "Python — component rendering" \
+  python3 -m pytest shared/sx/tests/test_components.py -v --tb=short
+
+run_suite "Python — parser" \
+  python3 -m pytest shared/sx/tests/test_parser.py -v --tb=short
+
 # -------------------------------------------------------------------
 # 5. Playwright tests (browser)
 # -------------------------------------------------------------------