diff --git a/test/bad/t10-initialization.ept b/test/bad/t10-initialization.ept
new file mode 100644
index 0000000..0d9ec34
--- /dev/null
+++ b/test/bad/t10-initialization.ept
@@ -0,0 +1,12 @@
+node toto() returns (o : int)
+var last x : int; y,z : int;
+let
+  y = 0;
+  automaton
+    state S1
+    do x = pre y; z = 0 -> x until true then S2
+    state S2
+    do x = last x; z = x until false then S1
+  end;
+  o = z;
+tel
diff --git a/test/bad/t11-initialization.ept b/test/bad/t11-initialization.ept
new file mode 100644
index 0000000..76ece05
--- /dev/null
+++ b/test/bad/t11-initialization.ept
@@ -0,0 +1,11 @@
+node mmm(x: int) returns (o': int)
+  var last m: int; o: int;
+  let
+    automaton
+      state I
+        do m = 1; o = last m + 2 until (o = 1) then J
+      state J
+        do m = last m + 1; o = 0
+    end;
+    o' = 1 -> pre o
+  tel
diff --git a/test/bad/t9-initialization.ept b/test/bad/t9-initialization.ept
new file mode 100644
index 0000000..fe4e40b
--- /dev/null
+++ b/test/bad/t9-initialization.ept
@@ -0,0 +1,6 @@
+node toto() returns (o : int)
+var last x : int;
+let
+  o = x;
+  x = last x;
+tel
diff --git a/test/good/t1.ept b/test/good/t1.ept
index 069bce3..d078cf8 100644
--- a/test/good/t1.ept
+++ b/test/good/t1.ept
@@ -18,11 +18,11 @@ node mm(x: int) returns (o: int)
   tel
 
 node mmm(x: int) returns (o': int)
-  var last m: int; o: int;
+  var last m: int = 1; o: int;
   let
     automaton
       state I
-        do m = 1; o = last m + 2 until (o = 1) then J
+        do m = 0; o = last m + 1 until (o = 1) then J
       state J
         do m = last m + 1; o = 0
     end;