diff --git a/test/node_modules/mapbox-gl-js-test.js b/test/node_modules/mapbox-gl-js-test.js
index d103aae6c4e..8ccc030257a 100644
--- a/test/node_modules/mapbox-gl-js-test.js
+++ b/test/node_modules/mapbox-gl-js-test.js
@@ -9,7 +9,7 @@ tap.Test.prototype.addAssert('equalWithPrecision', 3, assertEqualWithPrecision);
 function assertEqualWithPrecision(expected, actual, multiplier, message, extra) {
     message = message || `should be equal to within ${multiplier}`;
     const expectedRounded = Math.round(expected / multiplier) * multiplier;
-    const actualRounded = Math.round(expected / multiplier) * multiplier;
+    const actualRounded = Math.round(actual / multiplier) * multiplier;
 
     return this.equal(expectedRounded, actualRounded, message, extra);
 }