diff --git a/pxtrunner/runner.ts b/pxtrunner/runner.ts
index 8a624fae6187..efa015fb89d6 100644
--- a/pxtrunner/runner.ts
+++ b/pxtrunner/runner.ts
@@ -471,7 +471,7 @@ namespace pxt.runner {
         try {
             const start = Date.now();
             const result = await pxt.Cloud.downloadBuiltSimJsInfoAsync(simOptions.id);
-            pxt.tickEvent("runner.fetchSimJsInfo", { durationMs: Date.now() - start});
+            pxt.tickEvent("runner.fetchSimJsInfo", { durationMs: Date.now() - start });
             return result;
         } catch (e) {
             // This exception will happen in the majority of cases, so we don't want to log it unless for debugging.
@@ -544,7 +544,7 @@ namespace pxt.runner {
 
         const res = pxtc.buildSimJsInfo(compileResult);
         res.parts = compileResult.usedParts;
-        pxt.tickEvent("runner.buildSimJsInfo", { durationMs: Date.now() - start});
+        pxt.tickEvent("runner.buildSimJsInfo", { durationMs: Date.now() - start });
         return res;
     }