diff --git a/pidgy/compat/markdown.ipynb b/pidgy/compat/markdown.ipynb
index 130797a0..6669ec1e 100644
--- a/pidgy/compat/markdown.ipynb
+++ b/pidgy/compat/markdown.ipynb
@@ -65,8 +65,12 @@
     "            quote, length = self.QUOTES[self.QUOTES[0] in str], len(str)\n",
     "            left, right = length - len(str.lstrip()), len(str.rstrip())\n",
     "            if not str[left:right].strip(): return str\n",
-    "            while str[right-1] == '\\\\':\n",
-    "                right -= 1\n",
+    "            if str[right-1] == '\\\\':\n",
+    "                while str[right-1] == '\\\\':\n",
+    "                    right -= 1\n",
+    "            else:\n",
+    "                if str[left:right].endswith(quote[0]):\n",
+    "                    quote = {\"'''\": '\"\"\"', '\"\"\"': \"'''\"}[quote]\n",
     "            return str[:left] + quote + str[left:right] + quote + trailing + str[right:]\n",
     "\n",
     "        def measure_base_indent(self, tokens, env):\n",
@@ -127,6 +131,15 @@
     "## utility functions for parsing and rendering"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "    import doctest"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 4,
@@ -156,7 +169,15 @@
     "            for token in token.children:\n",
     "                code = filter_tangle_tokens(token, code)\n",
     "        else:\n",
-    "            token.type in CODE_TYPES and token not in code and code.append(token)\n",
+    "            if token.type in CODE_TYPES:\n",
+    "                if token.type == \"code_block\":\n",
+    "                    while token.content.lstrip().startswith(\">>>\"):\n",
+    "                        start, end = next(doctest.DocTestParser._EXAMPLE_RE.finditer(token.content)).span()\n",
+    "                        token.map[0] = len(token.content[:end].splitlines())\n",
+    "                        token.content = token.content[end:]\n",
+    "                    if not token.content.strip(): return code\n",
+    "                if token not in code:\n",
+    "                    code.append(token)\n",
     "            if code and (code[-1].type == \"fence\") and code[-1].info:\n",
     "                code.pop(-1)\n",
     "        return code or [\n",
diff --git a/pidgy/tangle.ipynb b/pidgy/tangle.ipynb
index 6c479ba3..19b0eb7f 100644
--- a/pidgy/tangle.ipynb
+++ b/pidgy/tangle.ipynb
@@ -308,4 +308,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}
\ No newline at end of file
diff --git a/pidgy/testing.md b/pidgy/testing.md
index fb8c113f..320b6f89 100644
--- a/pidgy/testing.md
+++ b/pidgy/testing.md
@@ -16,6 +16,7 @@ we formally test code incrementally during interactive computing.
         visitor = traitlets.Instance('ast.NodeTransformer')
         results = traitlets.List()
         trace = traitlets.Any()
+        update = traitlets.Bool(True)
 
         @traitlets.default('trace')
         def _default_trace(self):
@@ -49,8 +50,9 @@ we formally test code incrementally during interactive computing.
         def stub(self):
             return self.trace.stub()
         def post_execute(self):
-            for test in self.results:
-                if self.trace.enabled:
-                    with self.trace: test.test()
-                else: test.test()
-                test.update()
+            if self.update:
+                for test in self.results:
+                    if self.trace.enabled:
+                        with self.trace: test.test()
+                    else: test.test()
+                    test.update()