diff --git a/java-client/src/test/java/org/opensearch/client/opensearch/model/EndpointTest.java b/java-client/src/test/java/org/opensearch/client/opensearch/model/EndpointTest.java
index 547e608732..b37f98622a 100644
--- a/java-client/src/test/java/org/opensearch/client/opensearch/model/EndpointTest.java
+++ b/java-client/src/test/java/org/opensearch/client/opensearch/model/EndpointTest.java
@@ -35,9 +35,15 @@
 import org.junit.Assert;
 import org.junit.Test;
 import org.opensearch.client.opensearch._types.ExpandWildcard;
+import org.opensearch.client.opensearch.core.GetRequest;
 import org.opensearch.client.opensearch.indices.RefreshRequest;
 
 public class EndpointTest extends Assert {
+    @Test
+    public void testIdEncoding() {
+        GetRequest req = new GetRequest.Builder().index("db").id("a:b:c::2.0").build();
+        assertEquals("/db/_doc/a%3Ab%3Ac%3A%3A2.0", GetRequest._ENDPOINT.requestUrl(req));
+    }
 
     @Test
     public void testArrayPathParameter() {
diff --git a/java-client/src/test/java/org/opensearch/client/util/PathEncoderTest.java b/java-client/src/test/java/org/opensearch/client/util/PathEncoderTest.java
index ef895c1549..0e0a5f8c15 100644
--- a/java-client/src/test/java/org/opensearch/client/util/PathEncoderTest.java
+++ b/java-client/src/test/java/org/opensearch/client/util/PathEncoderTest.java
@@ -35,5 +35,10 @@ public void testEncode() {
         String multiSegmentString = "a/b/c/_refresh";
         String encodedMultiSegmentString = PathEncoder.encode(multiSegmentString);
         assertEquals("a%2Fb%2Fc%2F_refresh", encodedMultiSegmentString);
+
+        // Test with a string that contains colon segment
+        String colonSegmentString = "a:b:c::2.0";
+        String encodedColonSegmentString = PathEncoder.encode(colonSegmentString);
+        assertEquals("a%3Ab%3Ac%3A%3A2.0", encodedColonSegmentString);
     }
 }