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diff --git a/Zend/tests/function_exists_basic.phpt b/Zend/tests/function_exists_basic.phpt
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+++ b/Zend/tests/function_exists_basic.phpt
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+--TEST--
+function_exists function : basic functionality 
+--FILE--
+<?php
+/* 
+ * proto bool function_exists(string function_name)
+ * Function is implemented in Zend/zend_builtin_functions.c
+*/ 
+
+echo "*** Testing function_exists() : basic functionality ***\n";
+
+echo "Internal function: ";
+var_dump(function_exists('function_exists'));
+
+echo "User defined function: ";
+function f() {}
+var_dump(function_exists('f'));
+
+echo "Case sensitivity: ";
+var_dump(function_exists('F'));
+
+echo "Non existent function: ";
+var_dump(function_exists('g'));
+
+echo "Method: ";
+Class C {
+	static function f() {}
+}
+var_dump(function_exists('C::f'));
+?>
+===Done===
+--EXPECT--
+*** Testing function_exists() : basic functionality ***
+Internal function: bool(true)
+User defined function: bool(true)
+Case sensitivity: bool(true)
+Non existent function: bool(false)
+Method: bool(false)
+===Done===