diff --git a/changelog.d/8335.misc b/changelog.d/8335.misc
new file mode 100644
index 000000000000..7e0a4c7d839f
--- /dev/null
+++ b/changelog.d/8335.misc
@@ -0,0 +1 @@
+Fix test logging to allow braces in log output.
\ No newline at end of file
diff --git a/tests/test_utils/logging_setup.py b/tests/test_utils/logging_setup.py
index 2d96b0fa8da4..fdfb840b6222 100644
--- a/tests/test_utils/logging_setup.py
+++ b/tests/test_utils/logging_setup.py
@@ -29,8 +29,7 @@ def emit(self, record):
         log_entry = self.format(record)
         log_level = record.levelname.lower().replace("warning", "warn")
         self.tx_log.emit(
-            twisted.logger.LogLevel.levelWithName(log_level),
-            log_entry.replace("{", r"(").replace("}", r")"),
+            twisted.logger.LogLevel.levelWithName(log_level), "{entry}", entry=log_entry
         )