diff --git a/noxfile.py b/noxfile.py
index 739470ab..dea8595b 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -1,5 +1,7 @@
 import nox
 
+nox.options.stop_on_first_error = True
+
 source_files = ("httpx", "tests", "setup.py", "noxfile.py")