diff --git a/tests/light/functional_tests/filterx/test_filterx.py b/tests/light/functional_tests/filterx/test_filterx.py
index 9022e0cf2..dda09ec78 100644
--- a/tests/light/functional_tests/filterx/test_filterx.py
+++ b/tests/light/functional_tests/filterx/test_filterx.py
@@ -2304,3 +2304,35 @@ def test_parse_windows_eventlog_xml(config, syslog_ng):
             },
         },
     }
+
+
+def test_startswith_endswith_includes(config, syslog_ng):
+    (file_true, file_false) = create_config(
+        config, r"""
+    result = json();
+    if (startswith($MSG, ["dummy_prefix", "foo"]))
+    {
+        result.startswith_foo = true;
+    };
+    bar_var = "bar";
+    if (includes($MSG, bar_var, ignorecase=true))
+    {
+        result.contains_bar = true;
+    };
+    baz_list = ["baz"];
+    if (endswith($MSG, baz_list, ignorecase=true))
+    {
+        result.endswith_baz = true;
+    };
+    if (includes(${values.str}, ${values.str}))
+    {
+        result.works_with_message_value = true;
+    };
+    $MSG = json();
+    $MSG = result;
+    """, msg="fooBARbAz",
+    )
+    syslog_ng.start(config)
+
+    assert "processed" not in file_false.get_stats()
+    assert file_true.read_log() == '{"startswith_foo":true,"contains_bar":true,"endswith_baz":true,"works_with_message_value":true}\n'