diff --git a/data/test.txt b/data/test.txt
index fe31b32..8c1de09 100644
--- a/data/test.txt
+++ b/data/test.txt
@@ -1 +1 @@
-( truc_bidule = true )
+NOT ( truc_bidule = false )
diff --git a/data/test2.txt b/data/test2.txt
new file mode 100644
index 0000000..6ac6b5e
--- /dev/null
+++ b/data/test2.txt
@@ -0,0 +1 @@
+NOT ( truc_bidule = true ) OR ( false ) AND machin = false
diff --git a/data/test3.txt b/data/test3.txt
new file mode 100644
index 0000000..5808f7f
--- /dev/null
+++ b/data/test3.txt
@@ -0,0 +1 @@
+NOT ( truc_bidule = true ) OR ( true ) AND machin = false
diff --git a/data/test4.txt b/data/test4.txt
new file mode 100644
index 0000000..76b6ba4
--- /dev/null
+++ b/data/test4.txt
@@ -0,0 +1 @@
+NOT true OR NOT false AND true OR false