diff --git a/tests/Benchmarks/API/MessagePackSerializationBench.php b/tests/Benchmarks/API/MessagePackSerializationBench.php
index d2431d6af94..93b2241a729 100644
--- a/tests/Benchmarks/API/MessagePackSerializationBench.php
+++ b/tests/Benchmarks/API/MessagePackSerializationBench.php
@@ -21,7 +21,10 @@ public function benchMessagePackSerialization($traceArray)
     public function provideTraceArrays()
     {
         for ($i = 0; $i < 100; $i++) {
-            \DDTrace\start_span();
+            $span = \DDTrace\start_span();
+            $span->name = 'bench.trace_serialization';
+            $span->meta['foo'] = 'bar';
+            $span->metrics['bar'] = 1;
         }
 
         for ($i = 0; $i < 100; $i++) {
diff --git a/tests/Benchmarks/API/TraceAnnotationsBench.php b/tests/Benchmarks/API/TraceAnnotationsBench.php
index c79275882f7..68f57de965c 100644
--- a/tests/Benchmarks/API/TraceAnnotationsBench.php
+++ b/tests/Benchmarks/API/TraceAnnotationsBench.php
@@ -14,7 +14,9 @@ class TraceAnnotationsBench
      */
     public function benchTraceAnnotationOverhead()
     {
-        $this->dummyFunction();
+        for ($i = 0; $i < 1000; $i++) {
+            $this->dummyFunction();
+        }
     }
 
     #[\DDTrace\Trace]