diff --git a/tests/neg/i5810.scala b/tests/neg/i5810.scala
new file mode 100644
index 000000000000..6d696a56ba54
--- /dev/null
+++ b/tests/neg/i5810.scala
@@ -0,0 +1,5 @@
+import language.strictEquality
+def f[T](x: T) =
+  if (x == null) ???        // error: cannot be compared
+  else if (x == "abc") ???  // error: cannot be compared
+  else ???
\ No newline at end of file