diff --git a/kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala b/kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala
index 4dbf25f95..c005de6da 100644
--- a/kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala
+++ b/kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala
@@ -120,5 +120,7 @@ class UtilsSuite extends KyuubiFunSuite {
       Utils.majorMinorVersion(KYUUBI_VERSION)._2)
     assert(Utils.shortVersion(KYUUBI_VERSION) ===
       KYUUBI_VERSION.stripSuffix("-SNAPSHOT"))
+    intercept[IllegalArgumentException](Utils.shortVersion("-" + KYUUBI_VERSION))
+    intercept[IllegalArgumentException](Utils.majorMinorVersion("-" + KYUUBI_VERSION))
   }
 }
diff --git a/kyuubi-common/src/test/scala/org/apache/kyuubi/config/KyuubiConfSuite.scala b/kyuubi-common/src/test/scala/org/apache/kyuubi/config/KyuubiConfSuite.scala
index a69ac3bee..5d405cdd3 100644
--- a/kyuubi-common/src/test/scala/org/apache/kyuubi/config/KyuubiConfSuite.scala
+++ b/kyuubi-common/src/test/scala/org/apache/kyuubi/config/KyuubiConfSuite.scala
@@ -86,4 +86,12 @@ class KyuubiConfSuite extends KyuubiFunSuite {
     assert(cloned.getOption(key).get === "xyz")
   }
 
+
+  test("to spark prefixed conf") {
+    val conf = KyuubiConf(false)
+    assert(conf.toSparkPrefixedConf.isEmpty)
+    assert(conf.set("kyuubi.kent", "yao").toSparkPrefixedConf.get("spark.kyuubi.kent") ===
+      Some("yao"))
+  }
+
 }