diff --git a/test/suite_clopts.py b/test/suite_clopts.py
index 51fee661e7..194abc8473 100644
--- a/test/suite_clopts.py
+++ b/test/suite_clopts.py
@@ -158,6 +158,14 @@ class case_tshark_name_resolution_clopts(subprocesstest.SubprocessTestCase):
 
     # XXX Add invalid name resolution.
 
+class case_tshark_unicode_clopts(subprocesstest.SubprocessTestCase):
+    def test_tshark_unicode_display_filter(self):
+        '''Unicode (UTF-8) display filter'''
+        cap_file = os.path.join(config.capture_dir, 'http.pcap')
+        self.runProcess((config.cmd_tshark, '-r', cap_file, '-Y', 'tcp.flags.str == "·······AP···"'))
+        self.assertTrue(self.grepOutput('HEAD.*/v4/iuident.cab'))
+
+
 class case_tshark_dump_glossaries(subprocesstest.SubprocessTestCase):
     def test_tshark_dump_glossary(self):
         for glossary in glossaries:
diff --git a/test/suite_dfilter/group_string_type.py b/test/suite_dfilter/group_string_type.py
index b3f9065b08..166ca753e3 100644
--- a/test/suite_dfilter/group_string_type.py
+++ b/test/suite_dfilter/group_string_type.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2013 by Gilbert Ramirez <gram@alumni.rice.edu>
+# -*- coding: utf-8 -*-
 #
 # SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -162,3 +163,11 @@ class case_string(dfiltertest.DFTestCase):
     def test_string_len(self):
         dfilter = 'len(http.request.method) == 4'
         self.assertDFilterCount(dfilter, 1)
+
+    def test_eq_unicode(self):
+        dfilter = 'tcp.flags.str == "·······AP···"'
+        self.assertDFilterCount(dfilter, 1)
+
+    def test_contains_unicode(self):
+        dfilter = 'tcp.flags.str contains "·······AP···"'
+        self.assertDFilterCount(dfilter, 1)