diff --git a/tests/scripts/thread-cert/node.py b/tests/scripts/thread-cert/node.py
index 06c1bac54..a2879e863 100755
--- a/tests/scripts/thread-cert/node.py
+++ b/tests/scripts/thread-cert/node.py
@@ -304,7 +304,7 @@ class OtbrDocker:
         # Example TXT entry:
         # "xp=\\000\\013\\184\\000\\000\\000\\000\\000"
         txt = {}
-        for entry in re.findall(r'"(.*?[^\\])"', line):
+        for entry in re.findall(r'"((?:[^\\]|\\.)*?)"', line):
             if entry == "":
                 continue