diff --git a/tests/testdata/_1vars_ b/tests/testdata/_1vars_
new file mode 100644
index 0000000..c754951
--- /dev/null
+++ b/tests/testdata/_1vars_
@@ -0,0 +1,4 @@
+# sample variable
+V1=hello
+# this should be overriden
+V2=hello
diff --git a/tests/testdata/_2vars_ b/tests/testdata/_2vars_
new file mode 100644
index 0000000..9089b4d
--- /dev/null
+++ b/tests/testdata/_2vars_
@@ -0,0 +1,2 @@
+this_is_a_wrong_line_to_be_ignored
+V2=world