diff --git a/ext/standard/tests/serialize/005.phpt b/ext/standard/tests/serialize/005.phpt
index 5c0e8a0d136..9123e4020e7 100644
--- a/ext/standard/tests/serialize/005.phpt
+++ b/ext/standard/tests/serialize/005.phpt
@@ -9,7 +9,7 @@ function do_autoload($class_name)
 {
 	if ($class_name != 'autoload_not_available')
 	{
-		require_once(dirname(__FILE__) . '/' . strtolower($class_name) . '.p5c');
+		require_once(dirname(__FILE__) . '/' . strtolower($class_name) . '.inc');
 	}
 	echo __FUNCTION__ . "($class_name)\n";
 }
diff --git a/ext/standard/tests/serialize/autoload_implements.p5c b/ext/standard/tests/serialize/autoload_implements.inc
similarity index 100%
rename from ext/standard/tests/serialize/autoload_implements.p5c
rename to ext/standard/tests/serialize/autoload_implements.inc
diff --git a/ext/standard/tests/serialize/autoload_interface.p5c b/ext/standard/tests/serialize/autoload_interface.inc
similarity index 100%
rename from ext/standard/tests/serialize/autoload_interface.p5c
rename to ext/standard/tests/serialize/autoload_interface.inc
diff --git a/ext/standard/tests/serialize/bug30234.phpt b/ext/standard/tests/serialize/bug30234.phpt
index ae3a0b2f556..aee42b28a15 100644
--- a/ext/standard/tests/serialize/bug30234.phpt
+++ b/ext/standard/tests/serialize/bug30234.phpt
@@ -8,7 +8,7 @@ Bug #30234 (__autoload() not invoked for interfaces)
 <?php
 
 spl_autoload_register(function ($class_name) {
-	require_once(dirname(__FILE__) . '/' . strtolower($class_name) . '.p5c');
+	require_once(dirname(__FILE__) . '/' . strtolower($class_name) . '.inc');
 	echo __FUNCTION__ . '(' . $class_name . ")\n";
 });
 
diff --git a/tests/classes/autoload_001.phpt b/tests/classes/autoload_001.phpt
index 6c09c4e04d3..01115f48880 100644
--- a/tests/classes/autoload_001.phpt
+++ b/tests/classes/autoload_001.phpt
@@ -8,7 +8,7 @@ ZE2 Autoload and class_exists
 <?php
 
 spl_autoload_register(function ($class_name) {
-	require_once(dirname(__FILE__) . '/' . $class_name . '.p5c');
+	require_once(dirname(__FILE__) . '/' . $class_name . '.inc');
 	echo 'autoload(' . $class_name . ")\n";
 });
 
diff --git a/tests/classes/autoload_002.phpt b/tests/classes/autoload_002.phpt
index ecb1a445124..7f5aa6c9cc9 100644
--- a/tests/classes/autoload_002.phpt
+++ b/tests/classes/autoload_002.phpt
@@ -8,7 +8,7 @@ ZE2 Autoload and get_class_methods
 <?php
 
 spl_autoload_register(function ($class_name) {
-	require_once(dirname(__FILE__) . '/' . $class_name . '.p5c');
+	require_once(dirname(__FILE__) . '/' . $class_name . '.inc');
 	echo 'autoload(' . $class_name . ")\n";
 });
 
diff --git a/tests/classes/autoload_003.phpt b/tests/classes/autoload_003.phpt
index f79b85a9f03..783dd504e2d 100644
--- a/tests/classes/autoload_003.phpt
+++ b/tests/classes/autoload_003.phpt
@@ -8,7 +8,7 @@ ZE2 Autoload and derived classes
 <?php
 
 spl_autoload_register(function ($class_name) {
-	require_once(dirname(__FILE__) . '/' . $class_name . '.p5c');
+	require_once(dirname(__FILE__) . '/' . $class_name . '.inc');
 	echo 'autoload(' . $class_name . ")\n";
 });
 
diff --git a/tests/classes/autoload_004.phpt b/tests/classes/autoload_004.phpt
index 1f754ca0303..c6ce400c36d 100644
--- a/tests/classes/autoload_004.phpt
+++ b/tests/classes/autoload_004.phpt
@@ -9,7 +9,7 @@ ZE2 Autoload and recursion
 
 spl_autoload_register(function ($class_name) {
 	var_dump(class_exists($class_name));
-	require_once(dirname(__FILE__) . '/' . $class_name . '.p5c');
+	require_once(dirname(__FILE__) . '/' . $class_name . '.inc');
 	echo 'autoload(' . $class_name . ")\n";
 });
 
diff --git a/tests/classes/autoload_005.phpt b/tests/classes/autoload_005.phpt
index 26f4d6ae108..a04ea0eccf7 100644
--- a/tests/classes/autoload_005.phpt
+++ b/tests/classes/autoload_005.phpt
@@ -9,7 +9,7 @@ ZE2 Autoload from destructor
 
 spl_autoload_register(function ($class_name) {
 	var_dump(class_exists($class_name, false));
-	require_once(dirname(__FILE__) . '/' . $class_name . '.p5c');
+	require_once(dirname(__FILE__) . '/' . $class_name . '.inc');
 	echo 'autoload(' . $class_name . ")\n";
 });
 
diff --git a/tests/classes/autoload_006.phpt b/tests/classes/autoload_006.phpt
index 092e2e22529..127de880aba 100644
--- a/tests/classes/autoload_006.phpt
+++ b/tests/classes/autoload_006.phpt
@@ -8,7 +8,7 @@ ZE2 Autoload from destructor
 <?php
 
 spl_autoload_register(function ($class_name) {
-	require_once(dirname(__FILE__) . '/' . strtolower($class_name) . '.p5c');
+	require_once(dirname(__FILE__) . '/' . strtolower($class_name) . '.inc');
 	echo 'autoload(' . $class_name . ")\n";
 });
 
diff --git a/tests/classes/autoload_derived.p5c b/tests/classes/autoload_derived.inc
similarity index 100%
rename from tests/classes/autoload_derived.p5c
rename to tests/classes/autoload_derived.inc
diff --git a/tests/classes/autoload_implements.p5c b/tests/classes/autoload_implements.inc
similarity index 100%
rename from tests/classes/autoload_implements.p5c
rename to tests/classes/autoload_implements.inc
diff --git a/tests/classes/autoload_interface.p5c b/tests/classes/autoload_interface.inc
similarity index 100%
rename from tests/classes/autoload_interface.p5c
rename to tests/classes/autoload_interface.inc
diff --git a/tests/classes/autoload_root.p5c b/tests/classes/autoload_root.inc
similarity index 100%
rename from tests/classes/autoload_root.p5c
rename to tests/classes/autoload_root.inc