1 files changed, 7 insertions, 0 deletions

diff --git a/rust/macros/tests/invalid/no-comma.rs b/rust/macros/tests/invalid/no-comma.rs
new file mode 100644
index 0000000..c4e6a92
--- /dev/null
+++ b/rust/macros/tests/invalid/no-comma.rs
@@ -0,0 +1,7 @@
+use macros::hashmap;
+use std::collections::HashMap;
+
+fn main() {
+    // Key value pairs must be separated by commas
+    let _hm: HashMap<_, _> = hashmap!('a' => 1 'b' => 2);
+}