diff --git a/texk/web2c/synctexdir/ChangeLog b/texk/web2c/synctexdir/ChangeLog
index 986b0caa9a..b41e4d9394 100644
--- a/texk/web2c/synctexdir/ChangeLog
+++ b/texk/web2c/synctexdir/ChangeLog
@@ -1,3 +1,7 @@
+2023-08-27  TANAKA Takuji  <ttk@t-lab.opal.ne.jp>
+
+	* synctex.test: Make easier to test on Windows.
+
 2023-03-09  Karl Berry  <karl@tug.org>
 
 	* TL'23 release.
diff --git a/texk/web2c/synctexdir/synctex.test b/texk/web2c/synctexdir/synctex.test
index c97618cf19..fe119c9951 100755
--- a/texk/web2c/synctexdir/synctex.test
+++ b/texk/web2c/synctexdir/synctex.test
@@ -4,5 +4,9 @@
 # Copyright 2014 Peter Breitenlohner <tex-live@tug.org>
 # You may freely use, modify and/or distribute this file.
 
-./synctex help || exit 1
+BinDir=${BinDir:-.}
+ExeExt=${ExeExt:-}
+_synctex=$BinDir/synctex$ExeExt
+
+$_synctex help || exit 1