diff --git a/runtime/js/40_testing.js b/runtime/js/40_testing.js
index 4e7c231b2a..38382f9fda 100644
--- a/runtime/js/40_testing.js
+++ b/runtime/js/40_testing.js
@@ -223,8 +223,28 @@ finishing test case.`;
     return core.opSync("op_get_test_origin");
   }
 
-  function dispatchTestEvent(event) {
-    return core.opSync("op_dispatch_test_event", event);
+  function reportTestPlan(plan) {
+    core.opSync("op_dispatch_test_event", {
+      plan,
+    });
+  }
+
+  function reportTestConsoleOutput(console) {
+    core.opSync("op_dispatch_test_event", {
+      output: { console },
+    });
+  }
+
+  function reportTestWait(test) {
+    core.opSync("op_dispatch_test_event", {
+      wait: test,
+    });
+  }
+
+  function reportTestResult(test, result, elapsed) {
+    core.opSync("op_dispatch_test_event", {
+      result: [test, result, elapsed],
+    });
   }
 
   async function runTests({
@@ -234,13 +254,7 @@ finishing test case.`;
     const origin = getTestOrigin();
     const originalConsole = globalThis.console;
 
-    globalThis.console = new Console((line) => {
-      dispatchTestEvent({
-        output: {
-          console: line,
-        },
-      });
-    });
+    globalThis.console = new Console(reportTestConsoleOutput);
 
     const only = ArrayPrototypeFilter(tests, (test) => test.only);
     const filtered = ArrayPrototypeFilter(
@@ -248,13 +262,11 @@ finishing test case.`;
       createTestFilter(filter),
     );
 
-    dispatchTestEvent({
-      plan: {
-        origin,
-        total: filtered.length,
-        filteredOut: tests.length - filtered.length,
-        usedOnly: only.length > 0,
-      },
+    reportTestPlan({
+      origin,
+      total: filtered.length,
+      filteredOut: tests.length - filtered.length,
+      usedOnly: only.length > 0,
     });
 
     if (shuffle !== null) {
@@ -282,12 +294,12 @@ finishing test case.`;
       };
       const earlier = DateNow();
 
-      dispatchTestEvent({ wait: description });
+      reportTestWait(description);
 
       const result = await runTest(test);
       const elapsed = DateNow() - earlier;
 
-      dispatchTestEvent({ result: [description, result, elapsed] });
+      reportTestResult(description, result, elapsed);
     }
 
     globalThis.console = originalConsole;