diff --git a/.gitignore b/.gitignore
index e1895b1..59fe709 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,3 +64,7 @@ vendor/raylib/web/
 test/slurp-out.txt
 test/slurp-made.txt
 test/web-files-out.txt
+
+# Python bytecode from the tools directory
+__pycache__/
+*.pyc
diff --git a/test/test_dev.ml b/test/test_dev.ml
index 05a55d6..d64ecae 100644
--- a/test/test_dev.ml
+++ b/test/test_dev.ml
@@ -775,6 +775,11 @@ let () =
           let want =
             [ ("n", "i64", "3");
               ("label", "string", "\"hello\"");
+              (* Colons, deliberately: this is the *renderer's* output, not
+                 source. [render.ml] still prints [{:x ...}] because
+                 [flan-inspect.el] parses that text and the two move together
+                 or not at all — see NEXT.md. Converting this line with the
+                 rest was wrong and the suite caught it. *)
               ("p", "Point", "(Point {:x 1.5 :y 2.5})");
               ("xs", "[3 i32]", "[ 10 20 30]");
               ("flag", "bool", "true") ]
@@ -813,7 +818,7 @@ let () =
            one slot more than the body this session now holds. *)
         let r =
           ask
-            "(:op \"eval\" :code \"(defn look [n i64  label string] i64 (let [p (Point {:x 1.5 :y 2.5}) xs [10 20 30]] (restart-case (do (error (Boom {:why 7})) (let [after (i64 99)] after)) (carry-on [] 5))))\" :file \"/tmp/buf.flan\")"
+            "(:op \"eval\" :code \"(defn look [n i64  label string] i64 (let [p (Point {.x 1.5 .y 2.5}) xs [10 20 30]] (restart-case (do (error (Boom {.why 7})) (let [after (i64 99)] after)) (carry-on [] 5))))\" :file \"/tmp/buf.flan\")"
         in
         if status r <> "ok" then
           fail "installing a body with fewer slots while stopped: %s"
diff --git a/tools/__pycache__/colon-to-dot.cpython-313.pyc b/tools/__pycache__/colon-to-dot.cpython-313.pyc
deleted file mode 100644
index 5c381bf..0000000
Binary files a/tools/__pycache__/colon-to-dot.cpython-313.pyc and /dev/null differ