diff --git a/nixos/lib/test-driver/test_driver/driver.py b/nixos/lib/test-driver/test_driver/driver.py
index 0e5f013193f..e32f6810ca8 100644
--- a/nixos/lib/test-driver/test_driver/driver.py
+++ b/nixos/lib/test-driver/test_driver/driver.py
@@ -86,7 +86,7 @@ class Driver:
 
     def subtest(self, name: str) -> Iterator[None]:
         """Group logs under a given test name"""
-        with rootlog.nested(name):
+        with rootlog.nested("subtest: " + name):
             try:
                 yield
                 return True
diff --git a/nixos/lib/test-driver/test_driver/logger.py b/nixos/lib/test-driver/test_driver/logger.py
index 5b3091a5129..59ed2954723 100644
--- a/nixos/lib/test-driver/test_driver/logger.py
+++ b/nixos/lib/test-driver/test_driver/logger.py
@@ -1,4 +1,4 @@
-from colorama import Style
+from colorama import Style, Fore
 from contextlib import contextmanager
 from typing import Any, Dict, Iterator
 from queue import Queue, Empty
@@ -81,7 +81,11 @@ class Logger:
 
     @contextmanager
     def nested(self, message: str, attributes: Dict[str, str] = {}) -> Iterator[None]:
-        self._eprint(self.maybe_prefix(message, attributes))
+        self._eprint(
+            self.maybe_prefix(
+                Style.BRIGHT + Fore.GREEN + message + Style.RESET_ALL, attributes
+            )
+        )
 
         self.xml.startElement("nest", attrs={})
         self.xml.startElement("head", attributes)