diff --git a/ext/standard/tests/strings/similar_text_basic.phpt b/ext/standard/tests/strings/similar_text_basic.phpt
new file mode 100644
index 00000000000..cf2044b4c87
--- /dev/null
+++ b/ext/standard/tests/strings/similar_text_basic.phpt
@@ -0,0 +1,44 @@
+--TEST--
+similar_text(), basic tests
+--CREDITS--
+Mats Lindh <mats at lindh.no>
+#Testfest php.no
+--INI--
+precision=14
+--FILE--
+<?php
+/* Prototype  : proto int similar_text(string str1, string str2 [, float percent])
+* Description: Calculates the similarity between two strings
+* Source code: ext/standard/string.c
+*/
+echo "\n-- Basic calls with just two strings --\n"; 
+var_dump(similar_text("abcdefgh", "efg"));
+var_dump(similar_text("abcdefgh", "mno"));
+var_dump(similar_text("abcdefghcc", "c"));
+var_dump(similar_text("abcdefghabcdef", "zzzzabcdefggg"));
+
+echo "\n-- Same calls with precentage return variable specified --\n"; 
+$percent = 0;
+similar_text("abcdefgh", "efg", $percent);
+var_dump($percent);
+similar_text("abcdefgh", "mno", $percent);
+var_dump($percent);
+similar_text("abcdefghcc", "c", $percent);
+var_dump($percent);
+similar_text("abcdefghabcdef", "zzzzabcdefggg", $percent);
+var_dump($percent);
+?>
+===DONE===
+--EXPECTF--
+-- Basic calls with just two strings --
+int(3)
+int(0)
+int(1)
+int(7)
+
+-- Same calls with precentage return variable specified --
+float(54.545454545455)
+float(0)
+float(18.181818181818)
+float(51.851851851852)
+===DONE===
diff --git a/ext/standard/tests/strings/similar_text_error.phpt b/ext/standard/tests/strings/similar_text_error.phpt
new file mode 100644
index 00000000000..a6e3a4674c4
--- /dev/null
+++ b/ext/standard/tests/strings/similar_text_error.phpt
@@ -0,0 +1,29 @@
+--TEST--
+similar_text(), error tests for missing parameters
+--CREDITS--
+Mats Lindh <mats at lindh.no>
+#Testfest php.no
+--FILE--
+<?php
+/* Prototype  : proto int similar_text(string str1, string str2 [, float percent])
+* Description: Calculates the similarity between two strings
+* Source code: ext/standard/string.c
+*/
+
+$extra_arg = 10;
+echo "\n-- Testing similar_text() function with more than expected no. of arguments --\n";
+similar_text("abc", "def", $percent, $extra_arg);
+
+echo "\n-- Testing similar_text() function with less than expected no. of arguments --\n";
+similar_text("abc");
+?>
+===DONE===
+--EXPECTF--
+-- Testing similar_text() function with more than expected no. of arguments --
+
+Warning: Wrong parameter count for similar_text() in %s on line %d
+
+-- Testing similar_text() function with less than expected no. of arguments --
+
+Warning: Wrong parameter count for similar_text() in %s on line %d
+===DONE===