diff --git a/test/micro/org/openjdk/bench/java/lang/Integers.java b/test/micro/org/openjdk/bench/java/lang/Integers.java
index 43ceb5d18d2..9bf0be06d3d 100644
--- a/test/micro/org/openjdk/bench/java/lang/Integers.java
+++ b/test/micro/org/openjdk/bench/java/lang/Integers.java
@@ -106,6 +106,13 @@ public class Integers {
         }
     }
 
+    @Benchmark
+    public void toHexString(Blackhole bh) {
+        for (int i : intsBig) {
+            bh.consume(Integer.toHexString(i));
+        }
+    }
+
     /** Performs toString on large values, roughly 10 digits. */
     @Benchmark
     public void toStringBig(Blackhole bh) {
diff --git a/test/micro/org/openjdk/bench/java/lang/Longs.java b/test/micro/org/openjdk/bench/java/lang/Longs.java
index 765d00e9fb9..1e64b77ba90 100644
--- a/test/micro/org/openjdk/bench/java/lang/Longs.java
+++ b/test/micro/org/openjdk/bench/java/lang/Longs.java
@@ -85,6 +85,14 @@ public class Longs {
         }
     }
 
+    /** Performs toString on large values, around 10 digits. */
+    @Benchmark
+    public void toHexString(Blackhole bh) {
+        for (long value : longArrayBig) {
+            bh.consume(Long.toHexString(value));
+        }
+    }
+
     /** Performs toString on large values, around 10 digits. */
     @Benchmark
     public void toStringBig(Blackhole bh) {