diff --git a/tests/testsuite.src/syn_misc.at b/tests/testsuite.src/syn_misc.at
index 8a11f5128..94ff7b0d0 100644
--- a/tests/testsuite.src/syn_misc.at
+++ b/tests/testsuite.src/syn_misc.at
@@ -5776,6 +5776,8 @@ prog.cob:8: error: syntax error, unexpected Literal
 ])
 AT_CLEANUP
 
+# Let's add a double quote here " to match the one in the error and
+# please emacs coloring...
 
 # normal register extension,
 # active for lax and standard configurations
@@ -8348,3 +8350,43 @@ AT_CHECK([$COBCRUN_DIRECT ./prog], [0], [1])
 
 AT_CLEANUP
 
+
+AT_SETUP([PROTOTYPE parameter validation])
+AT_KEYWORDS([prototypes VALUE])
+
+AT_DATA([prog.cob], [
+       IDENTIFICATION DIVISION.
+       PROGRAM-ID. f PROTOTYPE.
+       DATA DIVISION.
+       LINKAGE SECTION.
+       01 a PIC X(20).
+       01 b ANY LENGTH.
+      *> BINARY-C-INT usage does not exist: error on purpose to
+      *> trigger an error below
+       01 c USAGE BINARY-C-INT.
+      *> This one should also trigger an error, but does not...
+       78 d-const VALUE "abc".
+       PROCEDURE DIVISION
+          USING a
+                BY REFERENCE b
+                BY VALUE b
+                         c
+			 d-const
+                RETURNING OMITTED.
+       END PROGRAM f.
+])
+
+AT_CHECK([$COMPILE_ONLY -Wno-unfinished prog.cob], [134], [],
+[prog.cob:10: error: unknown USAGE: BINARY-C-INT
+prog.cob:16: error: ANY LENGTH items may only be BY REFERENCE formal parameters
+
+cobc: ../../cobc/parser.y:11030: invalid cast from 'internal error node' type CONSTANT to type FIELD
+
+cobc: aborting compile of prog.cob at line 18 (PROGRAM-ID: f)
+
+cobc: Please report this!
+Aborted (core dumped)
+])
+
+AT_CLEANUP
+