diff --git a/jcstress-tests/src/jcstress/java/net/minestom/server/utils/ObjectPoolTest.java b/jcstress-tests/src/jcstress/java/net/minestom/server/utils/ObjectPoolTest.java
new file mode 100644
index 000000000..92e0fdeec
--- /dev/null
+++ b/jcstress-tests/src/jcstress/java/net/minestom/server/utils/ObjectPoolTest.java
@@ -0,0 +1,32 @@
+package net.minestom.server.utils;
+
+import net.minestom.server.utils.binary.BinaryBuffer;
+import org.openjdk.jcstress.annotations.*;
+import org.openjdk.jcstress.infra.results.L_Result;
+
+import static org.openjdk.jcstress.annotations.Expect.ACCEPTABLE;
+
+@JCStressTest
+@Outcome(id = "1", expect = ACCEPTABLE)
+@Outcome(id = "2", expect = ACCEPTABLE)
+@State
+public class ObjectPoolTest {
+    private final ObjectPool<BinaryBuffer> pool = ObjectPool.BUFFER_POOL;
+
+    @Actor
+    public void actor1() {
+        var buffer = pool.get();
+        pool.add(buffer);
+    }
+
+    @Actor
+    public void actor2() {
+        var buffer = pool.get();
+        pool.add(buffer);
+    }
+
+    @Arbiter
+    public void arbiter(L_Result r) {
+        r.r1 = pool.count();
+    }
+}
diff --git a/jcstress-tests/src/jcstress/java/net/minestom/server/utils/collection/ObjectArrayTest.java b/jcstress-tests/src/jcstress/java/net/minestom/server/utils/collection/ObjectArrayTest.java
new file mode 100644
index 000000000..8a146e1c7
--- /dev/null
+++ b/jcstress-tests/src/jcstress/java/net/minestom/server/utils/collection/ObjectArrayTest.java
@@ -0,0 +1,29 @@
+package net.minestom.server.utils.collection;
+
+import org.openjdk.jcstress.annotations.*;
+import org.openjdk.jcstress.infra.results.LL_Result;
+
+import static org.openjdk.jcstress.annotations.Expect.ACCEPTABLE;
+
+@JCStressTest
+@Outcome(id = "1, 2", expect = ACCEPTABLE)
+@State
+public class ObjectArrayTest {
+    private final ObjectArray<Integer> array = ObjectArray.concurrent();
+
+    @Actor
+    public void actor1() {
+        array.set(255, 1);
+    }
+
+    @Actor
+    public void actor2() {
+        array.set(32_000, 2);
+    }
+
+    @Arbiter
+    public void arbiter(LL_Result r) {
+        r.r1 = array.get(255);
+        r.r2 = array.get(32_000);
+    }
+}