diff --git a/flang/test/Preprocessing/parse-preprocessed.F b/flang/test/Preprocessing/parse-preprocessed.F
new file mode 100644
--- /dev/null
+++ b/flang/test/Preprocessing/parse-preprocessed.F
@@ -0,0 +1,15 @@
+! Verify that the output from `-E` is valid fixed-form source. See
+! https://bugs.llvm.org/show_bug.cgi?id=50993.
+
+! RUN: %flang_fc1 -E %s 2>&1 | %flang_fc1 -fsyntax-only -ffixed-form 2>&1 | FileCheck %s --allow-empty
+
+! CHECK-NOT: error
+! CHECK-NOT: warning
+
+! https://bugs.llvm.org/show_bug.cgi?id=51219
+! CHECK-NOT: Character in fixed-form label field must be a digit
+
+      PROGRAM HELLO
+        write(*, *), "hello, world!"
+c     Some irrelevant comment that's only valid in fixed-form
+      END PROGRAM