diff --git a/matlab/isolder.m b/matlab/isolder.m
index d3da5af60..2078b7bc6 100644
--- a/matlab/isolder.m
+++ b/matlab/isolder.m
@@ -65,24 +65,24 @@ end
 %$ cd tata
 %$ mkdir tutu
 %$ cd tutu
-%$ !touch a.m
+%$ system('touch a.m')
 %$ cd ..
-%$ !touch b.m
-%$ !touch c.m
+%$ system('touch b.m')
+%$ system('touch c.m')
 %$ cd ../titi
-%$ !touch d.m
+%$ system('touch d.m')
 %$ cd ..
 %$ pause(1)
-%$ !touch e.m
+%$ system('touch e.m')
 %$ t(1) = isequal(isolder('e.m'), false);
 %$ pause(1)
-%$ !touch tata/tutu/a.m
-%$ !touch tata/b.m
-%$ !touch tata/c.m
-%$ !touch titi/d.m
+%$ system('touch tata/tutu/a.m')
+%$ system('touch tata/b.m')
+%$ system('touch tata/c.m')
+%$ system('touch titi/d.m')
 %$ t(2) = isequal(isolder('e.m'), true);
 %$ pause(1)
-%$ !touch e.m
+%$ system('touch e.m')
 %$ t(3) = isequal(isolder('e.m'), false);
 %$ cd ..
 %$ rmdir('toto','s');