diff --git a/elixir-smie.el b/elixir-smie.el
index 6aec9a78..d7974bc5 100644
--- a/elixir-smie.el
+++ b/elixir-smie.el
@@ -391,7 +391,10 @@
     (`(:before . "fn")
      (smie-rule-parent))
     (`(:before . "for")
-     (smie-rule-parent))
+     (cond
+      ((elixir-smie-last-line-end-with-block-operator-p)
+       (smie-rule-parent elixir-smie-indent-basic))
+      (t (smie-rule-parent))))
     (`(:before . "do:")
      (cond
       ((smie-rule-parent-p "def" "if" "defp" "defmacro" "defmacrop")
diff --git a/test/elixir-mode-indentation-test.el b/test/elixir-mode-indentation-test.el
index 4684ebbb..5b1d9d67 100644
--- a/test/elixir-mode-indentation-test.el
+++ b/test/elixir-mode-indentation-test.el
@@ -1466,9 +1466,7 @@ end"
 end")
 
 (elixir-def-indentation-test case-with-for-comprehension
-                             ; the for-comprehension should get indented one level
-                             ; https://github.com/elixir-lang/emacs-elixir/issues/304
-                             (:expected-result :failed :tags '(indentation))
+                             (:tags '(indentation))
 "case expression do
   true ->
   for _ <- [] do