diff --git a/mypy/test/testfinegrained.py b/mypy/test/testfinegrained.py
index d5ea65510eb2..ba0526d32558 100644
--- a/mypy/test/testfinegrained.py
+++ b/mypy/test/testfinegrained.py
@@ -317,6 +317,7 @@ def maybe_suggest(self, step: int, server: Server, src: str, tmp_dir: str) -> li
                 # JSON contains already escaped \ on Windows, so requires a bit of care.
                 val = val.replace("\\\\", "\\")
                 val = val.replace(os.path.realpath(tmp_dir) + os.path.sep, "")
+                val = val.replace(os.path.abspath(tmp_dir) + os.path.sep, "")
             output.extend(val.strip().split("\n"))
         return normalize_messages(output)