diff --git a/ChangeLog b/ChangeLog
index a8c1c7142..3ebd903eb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2004-07-22  Alexandre Duret-Lutz  <adl@src.lip6.fr>
+
+	* src/ltltest/reduc.test: Use `test a = b' not `test a == b'.
+	Reported by <Denis.Poitrenaud@lip6.fr> (failure on Cygwin).
+
 2004-07-20  Alexandre Duret-Lutz  <adl@src.lip6.fr>
 
 	* src/tgbatest/defs.in (VALGRIND): Specify --tool=memcheck for
diff --git a/src/ltltest/reduc.test b/src/ltltest/reduc.test
index 48146a65e..858b2337f 100755
--- a/src/ltltest/reduc.test
+++ b/src/ltltest/reduc.test
@@ -36,7 +36,7 @@ for opt in 0 1 2 3; do
     ./reduc $opt "$f" >> result.data
   done
 
-  test $? == 0 || exit 1
+  test $? = 0 || exit 1
 
   perl -ne 'BEGIN { $sum1 = 0; $sum2 = 0; }
 /^(\d+)\s+(\d+)/;