diff --git a/test_suite/tests/ui/malformed/cut_off.rs b/test_suite/tests/ui/malformed/cut_off.rs
new file mode 100644
index 00000000..345731a1
--- /dev/null
+++ b/test_suite/tests/ui/malformed/cut_off.rs
@@ -0,0 +1,7 @@
+use serde_derive::Serialize;
+
+#[derive(Serialize)]
+#[serde(rename =)]
+struct S;
+
+fn main() {}
diff --git a/test_suite/tests/ui/malformed/cut_off.stderr b/test_suite/tests/ui/malformed/cut_off.stderr
new file mode 100644
index 00000000..d3945c30
--- /dev/null
+++ b/test_suite/tests/ui/malformed/cut_off.stderr
@@ -0,0 +1,5 @@
+error: unexpected end of input, expected literal
+ --> $DIR/cut_off.rs:4:17
+  |
+4 | #[serde(rename =)]
+  |                 ^
diff --git a/test_suite/tests/ui/malformed/not_list.rs b/test_suite/tests/ui/malformed/not_list.rs
new file mode 100644
index 00000000..dc88f1ca
--- /dev/null
+++ b/test_suite/tests/ui/malformed/not_list.rs
@@ -0,0 +1,8 @@
+use serde_derive::Serialize;
+
+#[derive(Serialize)]
+#[serde]
+#[serde = "?"]
+struct S;
+
+fn main() {}
diff --git a/test_suite/tests/ui/malformed/not_list.stderr b/test_suite/tests/ui/malformed/not_list.stderr
new file mode 100644
index 00000000..31eae65d
--- /dev/null
+++ b/test_suite/tests/ui/malformed/not_list.stderr
@@ -0,0 +1,11 @@
+error: expected #[serde(...)]
+ --> $DIR/not_list.rs:4:3
+  |
+4 | #[serde]
+  |   ^^^^^
+
+error: expected #[serde(...)]
+ --> $DIR/not_list.rs:5:3
+  |
+5 | #[serde = "?"]
+  |   ^^^^^^^^^^^