diff --git a/json_to_md.py b/json_to_md.py
index 27ddf0db..f1aab53c 100644
--- a/json_to_md.py
+++ b/json_to_md.py
@@ -60,7 +60,7 @@ def make_test_block(test, status, emoji, level, runtime_params):
             params = params_raw
 
         if params:
-            param_display = ", ".join(f"{k}={v}" for k, v in params.items())
+            param_display = ", ".join(f"{k}={stringify(v)}" for k, v in params.items())
             summary_note += f" <span style='color: #888; font-size: 0.9em;'>params: {param_display}</span>"
 
         callspec_block = "```\n" + stringify(callspec) + "\n```"