diff --git a/backend/request-filters.test.js b/backend/request-filters.test.js
index 583844bbc2..d6790342c8 100644
--- a/backend/request-filters.test.js
+++ b/backend/request-filters.test.js
@@ -128,26 +128,26 @@ describe('pathInvalidCharacterFilter tests', () => {
       req: {
         originalUrl: '/valid/../invalid/path',
       },
-      expectedError: 'Path contains invalid characters.',
+      expectedError: 'Path contains invalid characters',
     },
     {
       description: 'should throw an error when path contains NULL character',
       req: { originalUrl: '/valid/path%00' },
-      expectedError: 'Path contains invalid characters.',
+      expectedError: 'Path contains invalid characters',
     },
     {
       description: 'should throw an error for an improperly encoded path',
       req: {
         originalUrl: '/invalid%path',
       },
-      expectedError: 'Path contains invalid encoding.',
+      expectedError: 'Path contains invalid encoding',
     },
     {
       description: 'should throw an error for double encoded characters',
       req: {
         originalUrl: '/%252e%252e',
       },
-      expectedError: 'Path contains invalid encoding',
+      expectedError: 'Decoded path contains illegal % characters',
     },
   ];