diff --git a/lib/ManagedResources.js b/lib/ManagedResources.js
index d6746af..cb482dd 100644
--- a/lib/ManagedResources.js
+++ b/lib/ManagedResources.js
@@ -36,10 +36,9 @@ module.exports = class ManagedResources {
   }
 
   async destroyIdleResources() {
-    const destroys = this.#list.map((managedResource, index) => {
-      if (!managedResource.isIdle()) return;
-      return this.destroy(managedResource.resource).then(() => this.#removeManagedResource(managedResource, index));
-    });
+    const destroys = this.#list.map((managedResource, index) => (managedResource.isIdle()
+      ? managedResource.destroy().then(() => this.#removeManagedResource(managedResource, index))
+      : Promise.resolve()));
     return Promise.all(destroys);
   }
 
@@ -62,7 +61,7 @@ module.exports = class ManagedResources {
   }
 
   hasIdleResources() {
-    return Boolean(this.getIdleManagedResource());
+    return this.#list.some((managedResource) => managedResource.isIdle());
   }
 
   getIdleManagedResource() {
@@ -70,7 +69,7 @@ module.exports = class ManagedResources {
   }
 
   hasAcquiredResources() {
-    return Boolean(this.#list.find((managedResource) => managedResource.isAcquired()));
+    return this.#list.some((managedResource) => managedResource.isAcquired());
   }
 
   hasSpareCapacity() {