diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index dca0936c826..de1c6f551c4 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -1108,7 +1108,8 @@ fontified."
          (ignore-interpolation (not
                                 (seq-some
                                  (lambda (feats) (memq 'string-interpolation feats))
-                                 (seq-take treesit-font-lock-feature-list treesit-font-lock-level))))
+                                 (seq-take treesit-font-lock-feature-list
+                                           (treesit--compute-font-lock-level treesit-font-lock-level)))))
          ;; If interpolation is enabled, highlight only
          ;; string_start/string_content/string_end children.  Do not
          ;; touch interpolation node that can occur inside of the