diff --git a/tests/refl_002.phpt b/tests/refl_002.phpt
index 6ca903d..1a3479c 100644
--- a/tests/refl_002.phpt
+++ b/tests/refl_002.phpt
@@ -14,8 +14,6 @@ timecop.func_override=0
 
 $functions = [
 	'time' => 'timecop_time',
-	'mktime' => 'timecop_mktime',
-	'gmmktime' => 'timecop_gmmktime',
 	'date' => 'timecop_date',
 	'gmdate' => 'timecop_gmdate',
 	'idate' => 'timecop_idate',
@@ -34,8 +32,6 @@ require __DIR__.'/check-func-refl.inc.php';
 
 --EXPECT--
 Checking time vs timecop_time
-Checking mktime vs timecop_mktime
-Checking gmmktime vs timecop_gmmktime
 Checking date vs timecop_date
 Checking gmdate vs timecop_gmdate
 Checking idate vs timecop_idate
diff --git a/tests/refl_005.phpt b/tests/refl_005.phpt
new file mode 100644
index 0000000..106b2e3
--- /dev/null
+++ b/tests/refl_005.phpt
@@ -0,0 +1,25 @@
+--TEST--
+Check reflection data for overridden functions (On PHP 5.6 timecop_mktime() does not implement the $is_dst parameter)
+--SKIPIF--
+<?php
+$required_version = '7.0';
+$required_func = array();
+$required_class = array();
+$required_method = array();
+include(__DIR__."/tests-skipcheck.inc.php");
+--INI--
+date.timezone=America/Los_Angeles
+timecop.func_override=0
+--FILE--
+<?php
+
+$functions = [
+	'mktime' => 'timecop_mktime',
+	'gmmktime' => 'timecop_gmmktime',
+];
+
+require __DIR__.'/check-func-refl.inc.php';
+
+--EXPECT--
+Checking mktime vs timecop_mktime
+Checking gmmktime vs timecop_gmmktime