Cleanup ESLint warnings

1 files changed, 5 insertions, 5 deletions

diff --git a/vnext/setupTests.js b/vnext/setupTests.js
index b6aaf949..5f1e97dd 100644
--- a/vnext/setupTests.js
+++ b/vnext/setupTests.js
@@ -4,11 +4,11 @@ window.matchMedia = window.matchMedia || function() {
     return {
         matches: true,
         media: '',
-        addListener: function() { },
-        removeListener: function() { },
-        addEventListener: function() { },
-        removeEventListener: function() { },
+        addListener: function() { return true; },
+        removeListener: function() { return true; },
+        addEventListener: function() { return true; },
+        removeEventListener: function() { return true; },
         dispatchEvent: function() { return true; },
-        onchange: function() { }
+        onchange: function() { return true; }
     };
 };