diff --git a/ChangeLog b/ChangeLog
index cd417ef57..e710295a5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2004-01-09  Alexandre Duret-Lutz  <adl@src.lip6.fr>
 
+	* iface/gspn/dcswaveeltl.test, iface/gspn/udcsefm.test,
+	iface/gspn/udcseltl.test: Exercize -e2.
+
 	* src/tgbaalgos/emptinesscheck.cc (emptiness_check::check2):
 	New function, variant of emptiness_check::check().
 	* src/tgbaalgos/emptinesscheck.hh (emptiness_check::check2):
diff --git a/iface/gspn/dcswaveeltl.test b/iface/gspn/dcswaveeltl.test
index f19a87a68..de4ad2809 100755
--- a/iface/gspn/dcswaveeltl.test
+++ b/iface/gspn/dcswaveeltl.test
@@ -7,7 +7,9 @@ chmod +w DCSwave
 
 # G(ATTiIDLj => F(!SCj U SCi)) is true
 ../ltlgspn-srg -c -l -e DCSwave/DCSWave '!G(ATTiIDLj => F(!SCj U SCi))' ATTiIDLj SCi SCj > output || exit 1
+../ltlgspn-srg -c -f -e2 DCSwave/DCSWave '!G(ATTiIDLj => F(!SCj U SCi))' ATTiIDLj SCi SCj > output || exit 1
 
 # G(F(!SCj U SCi)) is false
 ../ltlgspn-srg -c -l -e  DCSwave/DCSWave '!G(F(!SCj U SCi))' ATTiIDLj SCi SCj >output
+../ltlgspn-srg -c -f -e2  DCSwave/DCSWave '!G(F(!SCj U SCi))' ATTiIDLj SCi SCj >output
 test $? = 1 || exit 1
diff --git a/iface/gspn/udcsefm.test b/iface/gspn/udcsefm.test
index 988eae037..314e9eba2 100755
--- a/iface/gspn/udcsefm.test
+++ b/iface/gspn/udcsefm.test
@@ -8,10 +8,15 @@ chmod +w udcs
 # F(ReP1 => F(gsP1)) is false
 ../ltlgspn-srg -c -f -e udcs/udcs 'F(ReP1 => F(gsP1))' ReP1 gsP1 > output
 test $? = 1 || exit 1
+../ltlgspn-srg -c -f -e2 udcs/udcs 'F(ReP1 => F(gsP1))' ReP1 gsP1 > output
+test $? = 1 || exit 1
 
 # !F(ReP1 => F(gsP1)) is true
 ../ltlgspn-srg -c -f -e udcs/udcs '!F(ReP1 => F(gsP1))' ReP1 gsP1 > output || exit 1
+../ltlgspn-srg -c -f -e2 udcs/udcs '!F(ReP1 => F(gsP1))' ReP1 gsP1 > output || exit 1
 
 # !G(ReP1 => F(gsP1)) is false
 ../ltlgspn-srg -c -f -e udcs/udcs '!G(ReP1 => F(gsP1))' ReP1 gsP1 > output
 test $? = 1 || exit 1
+../ltlgspn-srg -c -f -e2 udcs/udcs '!G(ReP1 => F(gsP1))' ReP1 gsP1 > output
+test $? = 1 || exit 1
diff --git a/iface/gspn/udcseltl.test b/iface/gspn/udcseltl.test
index f7899bfdb..02c01260e 100755
--- a/iface/gspn/udcseltl.test
+++ b/iface/gspn/udcseltl.test
@@ -8,10 +8,15 @@ chmod +w udcs
 # F(ReP1 => F(gsP1)) is false
 ../ltlgspn-srg -c -l -e udcs/udcs 'F(ReP1 => F(gsP1))' ReP1 gsP1 > output
 test $? = 1 || exit 1
+../ltlgspn-srg -c -l -e2 udcs/udcs 'F(ReP1 => F(gsP1))' ReP1 gsP1 > output
+test $? = 1 || exit 1
 
 # !F(ReP1 => F(gsP1)) is true
 ../ltlgspn-srg -c -l -e udcs/udcs '!F(ReP1 => F(gsP1))' ReP1 gsP1 > output || exit 1
+../ltlgspn-srg -c -l -e2 udcs/udcs '!F(ReP1 => F(gsP1))' ReP1 gsP1 > output || exit 1
 
 # !G(ReP1 => F(gsP1)) is false
 ../ltlgspn-srg -c -l -e udcs/udcs '!G(ReP1 => F(gsP1))' ReP1 gsP1 > output
 test $? = 1 || exit 1
+../ltlgspn-srg -c -l -e2 udcs/udcs '!G(ReP1 => F(gsP1))' ReP1 gsP1 > output
+test $? = 1 || exit 1