diff --git a/commander/src/test/java/com/iluwatar/commander/CommanderTest.java b/commander/src/test/java/com/iluwatar/commander/CommanderTest.java
index 482366a68..491b85b54 100644
--- a/commander/src/test/java/com/iluwatar/commander/CommanderTest.java
+++ b/commander/src/test/java/com/iluwatar/commander/CommanderTest.java
@@ -231,26 +231,47 @@ class CommanderTest {
 
     @Test
     void testPlaceOrderVanilla() throws Exception {
-        Commander c = buildCommanderObjectVanilla();
-        var order = new Order(new User("K", "J"), "pen", 1f);
-        c.placeOrder(order);
-        assertFalse(StringUtils.isBlank(order.id));
+        for (double d = 0.1; d < 2; d = d + 0.1) {
+            paymentTime *= d;
+            queueTaskTime *= d;
+            messageTime *= d;
+            employeeTime *= d;
+            queueTime *= d;
+            Commander c = buildCommanderObjectVanilla();
+            var order = new Order(new User("K", "J"), "pen", 1f);
+            c.placeOrder(order);
+            assertFalse(StringUtils.isBlank(order.id));
+        }
     }
 
     @Test
     void testPlaceOrder() throws Exception {
-        Commander c = buildCommanderObject(true);
-        var order = new Order(new User("K", "J"), "pen", 1f);
-        c.placeOrder(order);
-        assertFalse(StringUtils.isBlank(order.id));
+        for (double d = 0.1; d < 2; d = d + 0.1) {
+            paymentTime *= d;
+            queueTaskTime *= d;
+            messageTime *= d;
+            employeeTime *= d;
+            queueTime *= d;
+            Commander c = buildCommanderObject(true);
+            var order = new Order(new User("K", "J"), "pen", 1f);
+            c.placeOrder(order);
+            assertFalse(StringUtils.isBlank(order.id));
+        }
     }
 
     @Test
     void testPlaceOrder2() throws Exception {
-        Commander c = buildCommanderObject(false);
-        var order = new Order(new User("K", "J"), "pen", 1f);
-        c.placeOrder(order);
-        assertFalse(StringUtils.isBlank(order.id));
+        for (double d = 0.1; d < 2; d = d + 0.1) {
+            paymentTime *= d;
+            queueTaskTime *= d;
+            messageTime *= d;
+            employeeTime *= d;
+            queueTime *= d;
+            Commander c = buildCommanderObject(false);
+            var order = new Order(new User("K", "J"), "pen", 1f);
+            c.placeOrder(order);
+            assertFalse(StringUtils.isBlank(order.id));
+        }
     }
 
     @Test