diff --git a/dom/system/gonk/tests/marionette/test_ril_code_quality.py b/dom/system/gonk/tests/marionette/test_ril_code_quality.py
index 242ac20128d..a64fb52aa39 100644
--- a/dom/system/gonk/tests/marionette/test_ril_code_quality.py
+++ b/dom/system/gonk/tests/marionette/test_ril_code_quality.py
@@ -140,7 +140,10 @@ class ResourceUriFileReader:
     @classmethod
     def get_uri(cls, filename):
         """Convert filename to URI in system."""
-        return cls.URI_PREFIX + cls.URI_PATH[filename]
+        if filename.startswith(cls.URI_PREFIX):
+            return filename
+        else:
+            return cls.URI_PREFIX + cls.URI_PATH[filename]
 
     def __init__(self, marionette):
         self.runjs = lambda x: marionette.execute_script(x, new_sandbox=False)
@@ -278,13 +281,15 @@ class Linter:
             # Maintain a mapping table.
             # New line number after merge => original file and line number.
             info.append((dst_line, filepath, 1))
-
-            code = self.code_reader.read_file(filepath)
-            lines = code.splitlines(True)  # Keep '\n'.
-            src_results = StringUtility.auto_wrap_strict_mode(
-                StringUtility.auto_close(lines))
-            dst_results.extend(src_results)
-            dst_line += len(src_results)
+            try:
+                code = self.code_reader.read_file(filepath)
+                lines = code.splitlines(True)  # Keep '\n'.
+                src_results = StringUtility.auto_wrap_strict_mode(
+                    StringUtility.auto_close(lines))
+                dst_results.extend(src_results)
+                dst_line += len(src_results)
+            except:
+                info.pop()
         return dst_results, info
 
     def _convert_merged_result(self, error_lines, line_info):