diff --git a/test/CDB_JenksBinsTest.sql b/test/CDB_JenksBinsTest.sql
index 0f97e1c..8b55b0b 100644
--- a/test/CDB_JenksBinsTest.sql
+++ b/test/CDB_JenksBinsTest.sql
@@ -28,3 +28,9 @@ WITH data_inverse AS (
                  20.1, 19.9]::numeric[] AS s
 )
 SELECT unnest(CDB_JenksBins(s, 5, 0, true)) FROM data_inverse;
+
+
+WITH data_small AS (
+    SELECT Array[0.99, 1.0, 10.01, 10.01, 10.01, 10.01]::numeric[] AS s
+)
+SELECT unnest(CDB_JenksBins(s, 4)) FROM data_small;
diff --git a/test/CDB_JenksBinsTest_expect b/test/CDB_JenksBinsTest_expect
index 462c675..0dfaa43 100644
--- a/test/CDB_JenksBinsTest_expect
+++ b/test/CDB_JenksBinsTest_expect
@@ -13,3 +13,6 @@
 10.01
 14.99
 19.9
+0.99
+1.0
+10.01