diff --git a/ext/xmlwriter/tests/xmlwriter_toStream_encoding_gbk.phpt b/ext/xmlwriter/tests/xmlwriter_toStream_encoding_gbk.phpt
deleted file mode 100644
index a92f3f6c5825a..0000000000000
--- a/ext/xmlwriter/tests/xmlwriter_toStream_encoding_gbk.phpt
+++ /dev/null
@@ -1,18 +0,0 @@
---TEST--
-XMLWriter::toStream() with encoding - test GBK
---EXTENSIONS--
-xmlwriter
---FILE--
-<?php
-
-$h = fopen("php://output", "w");
-
-$writer = XMLWriter::toStream($h);
-$writer->startDocument(encoding: "GBK");
-$writer->writeComment("\u{00E9}\u{00E9}\u{00E9}");
-unset($writer);
-
-?>
---EXPECT--
-<?xml version="1.0" encoding="GBK"?>
-<!--¨¦¨¦¨¦-->
diff --git a/ext/xmlwriter/tests/xmlwriter_toStream_encoding_shiftjis.phpt b/ext/xmlwriter/tests/xmlwriter_toStream_encoding_shiftjis.phpt
new file mode 100644
index 0000000000000..eea1a4d5a88b5
--- /dev/null
+++ b/ext/xmlwriter/tests/xmlwriter_toStream_encoding_shiftjis.phpt
@@ -0,0 +1,18 @@
+--TEST--
+XMLWriter::toStream() with encoding - test SHIFT_JIS
+--EXTENSIONS--
+xmlwriter
+--FILE--
+<?php
+
+$h = fopen("php://output", "w");
+
+$writer = XMLWriter::toStream($h);
+$writer->startDocument(encoding: "SHIFT_JIS");
+$writer->writeComment("\u{3041}\u{3041}\u{3041}");
+unset($writer);
+
+?>
+--EXPECT--
+<?xml version="1.0" encoding="SHIFT_JIS"?>
+<!--‚Ÿ‚Ÿ‚Ÿ-->