diff --git a/src/_pytest/reports.py b/src/_pytest/reports.py
index 9e61d7def..1521ad767 100644
--- a/src/_pytest/reports.py
+++ b/src/_pytest/reports.py
@@ -208,7 +208,7 @@ class BaseReport:
                 return word, markup
 
         fail(
-            "pytest_report_teststatus() hook (from a plugin) returned "
+            f"pytest_report_teststatus() hook (from a plugin) returned "
             "an invalid verbose value: {verbose!r}.\nExpected either a string "
             "or a tuple of (word, markup)."
         )