1 files changed, 23 insertions, 13 deletions
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_identifier_conflict.py b/components/script/dom/bindings/codegen/parser/tests/test_identifier_conflict.py
index 0e9a6654aa7..7404c86f944 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_identifier_conflict.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_identifier_conflict.py
@@ -1,39 +1,49 @@
 # Import the WebIDL module, so we can do isinstance checks and whatnot
 import WebIDL
 
+
 def WebIDLTest(parser, harness):
     try:
-        parser.parse("""
+        parser.parse(
+            """
             enum Foo { "a" };
             interface Foo;
-        """)
+        """
+        )
         results = parser.finish()
         harness.ok(False, "Should fail to parse")
     except Exception as e:
-        harness.ok("Name collision" in e.message,
-                   "Should have name collision for interface")
+        harness.ok(
+            "Name collision" in str(e), "Should have name collision for interface"
+        )
 
     parser = parser.reset()
     try:
-        parser.parse("""
+        parser.parse(
+            """
             dictionary Foo { long x; };
             enum Foo { "a" };
-        """)
+        """
+        )
         results = parser.finish()
         harness.ok(False, "Should fail to parse")
     except Exception as e:
-        harness.ok("Name collision" in e.message,
-                   "Should have name collision for dictionary")
+        harness.ok(
+            "Name collision" in str(e), "Should have name collision for dictionary"
+        )
 
     parser = parser.reset()
     try:
-        parser.parse("""
+        parser.parse(
+            """
             enum Foo { "a" };
             enum Foo { "b" };
-        """)
+        """
+        )
         results = parser.finish()
         harness.ok(False, "Should fail to parse")
     except Exception as e:
-        harness.ok("Multiple unresolvable definitions" in e.message,
-                   "Should have name collision for dictionary")
-
+        harness.ok(
+            "Multiple unresolvable definitions" in str(e),
+            "Should have name collision for dictionary",
+        )