diff --git a/sentinel-core/src/test/java/com/alibaba/csp/sentinel/slots/DefaultSlotChainBuilderTest.java b/sentinel-core/src/test/java/com/alibaba/csp/sentinel/slots/DefaultSlotChainBuilderTest.java
index a76f871689..20c78e7a29 100644
--- a/sentinel-core/src/test/java/com/alibaba/csp/sentinel/slots/DefaultSlotChainBuilderTest.java
+++ b/sentinel-core/src/test/java/com/alibaba/csp/sentinel/slots/DefaultSlotChainBuilderTest.java
@@ -29,7 +29,7 @@ public void testBuild() {
 
         assertNotNull(slotChain);
 
-        // verify the order of slots
+        // verify the order of slot
         AbstractLinkedProcessorSlot<?> next = slotChain.getNext();
         assertTrue(next instanceof NodeSelectorSlot);