diff --git a/src/ol/source/TileDebug.js b/src/ol/source/TileDebug.js
index fb6af22061..0335e1d244 100644
--- a/src/ol/source/TileDebug.js
+++ b/src/ol/source/TileDebug.js
@@ -58,9 +58,10 @@ class LabeledTile extends Tile {
       context.strokeStyle = 'white';
       context.textAlign = 'center';
       context.textBaseline = 'middle';
-      context.font = 'bold 24px sans-serif';
-      context.fillText(this.text_, tileSize[0] / 2, tileSize[1] / 2, tileSize[0]);
+      context.font = '24px sans-serif';
+      context.lineWidth = 4;
       context.strokeText(this.text_, tileSize[0] / 2, tileSize[1] / 2, tileSize[0]);
+      context.fillText(this.text_, tileSize[0] / 2, tileSize[1] / 2, tileSize[0]);
 
       this.canvas_ = context.canvas;
       return context.canvas;