diff --git a/challenges/01-responsive-web-design/css-flexbox.json b/challenges/01-responsive-web-design/css-flexbox.json
index f5a81b882cb..12085d0838f 100644
--- a/challenges/01-responsive-web-design/css-flexbox.json
+++ b/challenges/01-responsive-web-design/css-flexbox.json
@@ -272,11 +272,11 @@
       "tests": [
         {
           "text": "The <code>header</code> should have a <code>flex-direction</code> property set to row.",
-          "testString": "assert(code.match(/header\\s*?{\\s*?.*?\\s*?.*?\\s*?flex-direction:\\s*?row;/g), 'The <code>header</code> should have a <code>flex-direction</code> property set to row.');"
+          "testString": "assert(code.match(/header\\s*?{[^}]*?flex-direction:\\s*?row;/g), 'The <code>header</code> should have a <code>flex-direction</code> property set to row.');"
         },
         {
           "text": "The <code>footer</code> should have a <code>flex-direction</code> property set to row.",
-          "testString": "assert(code.match(/footer\\s*?{\\s*?.*?\\s*?.*?\\s*?flex-direction:\\s*?row;/g), 'The <code>footer</code> should have a <code>flex-direction</code> property set to row.');"
+          "testString": "assert(code.match(/footer\\s*?{[^}]*?flex-direction:\\s*?row;/g), 'The <code>footer</code> should have a <code>flex-direction</code> property set to row.');"
         }
       ],
       "solutions": [