diff --git a/testing/web-platform/tests/tools/requirements_flake8.txt b/testing/web-platform/tests/tools/requirements_flake8.txt
index d2e7dd64232a..00d182e2d0f5 100644
--- a/testing/web-platform/tests/tools/requirements_flake8.txt
+++ b/testing/web-platform/tests/tools/requirements_flake8.txt
@@ -1,4 +1,4 @@
 flake8==3.6.0
 pycodestyle==2.4.0
-pyflakes==2.0.0
+pyflakes==2.1.0
 pep8-naming==0.7.0
diff --git a/testing/web-platform/tests/tools/wptrunner/wptrunner/metadata.py b/testing/web-platform/tests/tools/wptrunner/wptrunner/metadata.py
index e4060f38cf43..4368a9d3c1ba 100644
--- a/testing/web-platform/tests/tools/wptrunner/wptrunner/metadata.py
+++ b/testing/web-platform/tests/tools/wptrunner/wptrunner/metadata.py
@@ -509,7 +509,7 @@ class PackedResultList(object):
         prop = prop_intern.get((packed & 0xF000) >> 12)
 
         value_idx = (packed & 0x0F00) >> 8
-        if value_idx is 0:
+        if value_idx == 0:
             value = self.raw_data[idx]
         else:
             value = status_intern.get(value_idx)