diff --git a/modules/services/osmose.js b/modules/services/osmose.js
index b7fc2d0ee..4997ddb2f 100644
--- a/modules/services/osmose.js
+++ b/modules/services/osmose.js
@@ -230,7 +230,7 @@ export default {
 
         // Cache served item colors to automatically style issue markers later
         const { item: itemInt, color } = item;
-        if (color.test(/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/)) {
+        if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
           _colorCache[itemInt] = color;
         }
 
@@ -352,4 +352,4 @@ function jsonPromise(url, then) {
         reject(err);
       });
   });
-}
\ No newline at end of file
+}