diff --git a/tests/test_cases/input/zero_space_before_first_arg_fail.kdl b/tests/test_cases/input/zero_space_before_first_arg_fail.kdl
new file mode 100644
index 0000000..250d1f9
--- /dev/null
+++ b/tests/test_cases/input/zero_space_before_first_arg_fail.kdl
@@ -0,0 +1 @@
+node"string"
diff --git a/tests/test_cases/input/zero_space_before_prop_fail.kdl b/tests/test_cases/input/zero_space_before_prop_fail.kdl
new file mode 100644
index 0000000..4497205
--- /dev/null
+++ b/tests/test_cases/input/zero_space_before_prop_fail.kdl
@@ -0,0 +1 @@
+node foo="value"bar=5
diff --git a/tests/test_cases/input/zero_space_before_second_arg_fail.kdl b/tests/test_cases/input/zero_space_before_second_arg_fail.kdl
new file mode 100644
index 0000000..604500e
--- /dev/null
+++ b/tests/test_cases/input/zero_space_before_second_arg_fail.kdl
@@ -0,0 +1 @@
+node "string"1
diff --git a/tests/test_cases/input/zero_space_before_slashdash_arg_fail.kdl b/tests/test_cases/input/zero_space_before_slashdash_arg_fail.kdl
new file mode 100644
index 0000000..5a2a6b3
--- /dev/null
+++ b/tests/test_cases/input/zero_space_before_slashdash_arg_fail.kdl
@@ -0,0 +1 @@
+node "string"/-1