diff --git a/test/write_grids.test.js b/test/write_grids.test.js
index 4d30c1e..affd2a4 100644
--- a/test/write_grids.test.js
+++ b/test/write_grids.test.js
@@ -30,20 +30,17 @@ exports['test mbtiles file creation'] = function(beforeExit) {
             // Flip Y coordinate because file names are TMS, but .putGrid() expects XYZ.
             coords[2] = Math.pow(2, coords[3]) - 1 - coords[2];
 
-            fs.readFile(__dirname + '/fixtures/grids/' + file, 'utf8', function(err, grid) {
+            var grid = fs.readFileSync(__dirname + '/fixtures/grids/' + file, 'utf8');
+            mbtiles.putGrid(coords[3] | 0, coords[1] | 0, coords[2] | 0, JSON.parse(grid), function(err) {
                 if (err) throw err;
-
-                mbtiles.putGrid(coords[3] | 0, coords[1] | 0, coords[2] | 0, JSON.parse(grid), function(err) {
-                    if (err) throw err;
-                    completed.written++;
-                    if (completed.written === 241) {
-                        mbtiles.stopWriting(function(err) {
-                            completed.stopped = true;
-                            if (err) throw err;
-                            verifyWritten();
-                        });
-                    }
-                });
+                completed.written++;
+                if (completed.written === 241) {
+                    mbtiles.stopWriting(function(err) {
+                        completed.stopped = true;
+                        if (err) throw err;
+                        verifyWritten();
+                    });
+                }
             });
         }