diff --git a/unit_tests/clamscan/alz_test.py b/unit_tests/clamscan/alz_test.py
new file mode 100644
index 0000000000..e01c1798d2
--- /dev/null
+++ b/unit_tests/clamscan/alz_test.py
@@ -0,0 +1,45 @@
+# Copyright (C) 2020-2024 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+
+"""
+Run clamscan tests.
+"""
+
+import sys
+
+sys.path.append('../unit_tests')
+import testcase
+
+
+class TC(testcase.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        super(TC, cls).setUpClass()
+
+    @classmethod
+    def tearDownClass(cls):
+        super(TC, cls).tearDownClass()
+
+    def setUp(self):
+        super(TC, self).setUp()
+
+    def tearDown(self):
+        super(TC, self).tearDown()
+        self.verify_valgrind_log()
+
+    def test_pdf_hook(self):
+        self.step_name('Test alz files compressed with deflate (gzip)')
+
+        testfile = TC.path_source / 'unit_tests' / 'input' / 'other_scanfiles' / 'deflate.alz'
+        command = '{valgrind} {valgrind_args} {clamscan} -d {path_db} {testfile}'.format(
+            valgrind=TC.valgrind, valgrind_args=TC.valgrind_args, clamscan=TC.clamscan,
+            path_db=TC.path_source / 'unit_tests' / 'input' / 'other_sigs' / 'alz.hdb',
+            testfile=testfile,
+        )
+        output = self.execute_command(command)
+
+        assert output.ec == 1  # virus
+
+        expected_results = [
+            'test.txt.UNOFFICIAL FOUND',
+        ]
+        self.verify_output(output.out, expected=expected_results)
diff --git a/unit_tests/input/other_scanfiles/deflate.alz b/unit_tests/input/other_scanfiles/deflate.alz
new file mode 100644
index 0000000000..1114dab3d7
Binary files /dev/null and b/unit_tests/input/other_scanfiles/deflate.alz differ
diff --git a/unit_tests/input/other_sigs/alz.hdb b/unit_tests/input/other_sigs/alz.hdb
new file mode 100644
index 0000000000..659c80665d
--- /dev/null
+++ b/unit_tests/input/other_sigs/alz.hdb
@@ -0,0 +1,5 @@
+9645df16bc733a92129563ad2e5f1f6a9ed483c9:16:test.txt
+12f41f69d25d0ba9b73da429e0d69b27c95522db:16:test.txt
+03d4c70e6aa3832fa51959137b6a3fc55d8b9f55:16:test.txt
+26c0e077ad49260d416dbf449569efbc7ce02448:16:test.txt
+67b33eebc1e4537d839bc6b04affd6b06074c746:13:test.txt