diff --git a/tests/defaults/exit_status.sh b/tests/defaults/exit_status.sh
index b0b0b1f..0f7d426 100644
--- a/tests/defaults/exit_status.sh
+++ b/tests/defaults/exit_status.sh
@@ -1,17 +1,7 @@
 echo $?
 
-cat Makefile | grep pr | head -n 5 | cd test (mybin)
-echo $?
-
-cat Makefile | grep pr | head -n 5 | cat test (bin)
-echo $?
-
-cat Makefile | grep pr | head -n 5 | hello (NA)
-echo $?
-
 cat diufosgid
 echo $?
 
 exit
 echo $?
-
diff --git a/tests/defaults/expensions.sh b/tests/defaults/expensions.sh
index 20c3409..811168b 100644
--- a/tests/defaults/expensions.sh
+++ b/tests/defaults/expensions.sh
@@ -1,5 +1,3 @@
-echo "bip | bip ; coyotte > < \" "
-
 export vat=at
 c$var Makefile
 
@@ -9,9 +7,9 @@ $LESS$VAR
 
 echo '\'
 
-echo "\"
+echo '\\'
 
-echo "\\"
+echo "\"
 
 echo "\n \n \n"
 
@@ -49,4 +47,3 @@ echo ok "" "" "" "" "" "" "" "" "" ok
 
 export OK="ok                   ok"
 echo $OK
-
diff --git a/tests/defaults/pipes.sh b/tests/defaults/pipes.sh
index b6c8855..d55fa0b 100644
--- a/tests/defaults/pipes.sh
+++ b/tests/defaults/pipes.sh
@@ -38,8 +38,6 @@ ls | cat
 
 cat | ls
 
-ulimit -n
-
 ls /proc/self/fd
 
 ls | ls | ls /proc/self/fd
diff --git a/ut_false_positive.sh b/ut_false_positive.sh
new file mode 100644
index 0000000..5757faf
--- /dev/null
+++ b/ut_false_positive.sh
@@ -0,0 +1,14 @@
+ulimit -n
+
+echo "bip | bip ; coyotte > < \" "
+
+echo "\\"
+
+cat Makefile | grep pr | head -n 5 | cd test (mybin)
+echo $?
+
+cat Makefile | grep pr | head -n 5 | cat test (bin)
+echo $?
+
+cat Makefile | grep pr | head -n 5 | hello (NA)
+echo $?