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-rw-r--r--testing/web-platform/mach_commands.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/testing/web-platform/mach_commands.py b/testing/web-platform/mach_commands.py
index 4843658aa0..b0943e365e 100644
--- a/testing/web-platform/mach_commands.py
+++ b/testing/web-platform/mach_commands.py
@@ -189,7 +189,10 @@ class WebPlatformTestsRunnerSetup(MozbuildObject):
wptrunner_path = os.path.join(self._here, "tests", "tools", "wptrunner")
browser_cls = run.product_setup[kwargs["product"]].browser_cls
requirements = ["requirements.txt"]
- if hasattr(browser_cls, "requirements"):
+ if (
+ hasattr(browser_cls, "requirements")
+ and browser_cls.requirements is not None
+ ):
requirements.append(browser_cls.requirements)
for filename in requirements: