diff --git a/jdbc-v2/src/test/java/com/clickhouse/jdbc/internal/JdbcConfigurationTest.java b/jdbc-v2/src/test/java/com/clickhouse/jdbc/internal/JdbcConfigurationTest.java
index 3114a4a32..ec64ae98f 100644
--- a/jdbc-v2/src/test/java/com/clickhouse/jdbc/internal/JdbcConfigurationTest.java
+++ b/jdbc-v2/src/test/java/com/clickhouse/jdbc/internal/JdbcConfigurationTest.java
@@ -17,19 +17,15 @@ public void testCleanUrl() {
         String cleanUrl = configuration.cleanUrl(url);
         assertEquals(cleanUrl, "http://localhost:8123/clickhouse?param1=value1&param2=value2");
 
+        // we do not support guessing by port numbers
         url = "jdbc:clickhouse://localhost:8443/clickhouse?param1=value1&param2=value2";
         cleanUrl = configuration.cleanUrl(url);
-        assertEquals(cleanUrl, "https://localhost:8443/clickhouse?param1=value1&param2=value2");
+        assertEquals(cleanUrl, "http://localhost:8443/clickhouse?param1=value1&param2=value2");
 
         Properties info = new Properties();
-        info.setProperty("ssl", "true");
-        configuration = new JdbcConfiguration("jdbc:clickhouse://localhost:8123/clickhouse?param1=value1&param2=value2", info);
-        cleanUrl = configuration.cleanUrl(url);
-        assertEquals(cleanUrl, "https://localhost:8123/clickhouse?param1=value1&param2=value2");
-
-        info.setProperty("ssl", "false");
-        configuration = new JdbcConfiguration("jdbc:clickhouse://localhost:8443/clickhouse?param1=value1&param2=value2", info);
+        configuration = new JdbcConfiguration("jdbc:clickhouse:https://localhost:8123/clickhouse?param1=value1&param2=value2", info);
+        url = "jdbc:clickhouse:https://localhost:8443/clickhouse?param1=value1&param2=value2";
         cleanUrl = configuration.cleanUrl(url);
-        assertEquals(cleanUrl, "http://localhost:8443/clickhouse?param1=value1&param2=value2");
+        assertEquals(cleanUrl, "https://localhost:8443/clickhouse?param1=value1&param2=value2");
     }
 }