diff --git a/test/unit/network_utils_spec.js b/test/unit/network_utils_spec.js
index 56de74408..6ed8e7de1 100644
--- a/test/unit/network_utils_spec.js
+++ b/test/unit/network_utils_spec.js
@@ -174,11 +174,29 @@ describe('network_utils', function() {
         }
       })).toEqual('filename.pdf');
 
+      expect(extractFilenameFromHeader((headerName) => {
+        if (headerName === 'Content-Disposition') {
+          return 'attachment; filename="filename.pdf and spaces.pdf"';
+        }
+      })).toEqual('filename.pdf and spaces.pdf');
+
+      expect(extractFilenameFromHeader((headerName) => {
+        if (headerName === 'Content-Disposition') {
+          return 'attachment; filename="tl;dr.pdf"';
+        }
+      })).toEqual('tl;dr.pdf');
+
       expect(extractFilenameFromHeader((headerName) => {
         if (headerName === 'Content-Disposition') {
           return 'attachment; filename=filename.pdf';
         }
       })).toEqual('filename.pdf');
+
+      expect(extractFilenameFromHeader((headerName) => {
+        if (headerName === 'Content-Disposition') {
+          return 'attachment; filename=filename.pdf someotherparam';
+        }
+      })).toEqual('filename.pdf');
     });
 
     it('gets the filename from the response header (RFC 6266)', function() {