diff --git a/test_regress/t/t_number_bad.out b/test_regress/t/t_number_bad.out
index dedb6786d..4a4568375 100644
--- a/test_regress/t/t_number_bad.out
+++ b/test_regress/t/t_number_bad.out
@@ -13,4 +13,13 @@
 %Error: t/t_number_bad.v:14:29: Illegal character in octal constant
    14 |    parameter integer FOO6 = 32'o8;
       |                             ^~~~~
+%Error: t/t_number_bad.v:17:33: Illegal character in binary constant: 4
+   17 |    parameter logic [3:0] FOO7 = 1'b1?4'hF:4'h1;   
+      |                                 ^~~~~~
+%Error: t/t_number_bad.v:17:33: Too many digits for 1 bit number: 1'b1?4
+   17 |    parameter logic [3:0] FOO7 = 1'b1?4'hF:4'h1;   
+      |                                 ^~~~~~
+%Error: t/t_number_bad.v:17:39: syntax error, unexpected INTEGER NUMBER, expecting ';'
+   17 |    parameter logic [3:0] FOO7 = 1'b1?4'hF:4'h1;   
+      |                                       ^~~
 %Error: Exiting due to
diff --git a/test_regress/t/t_number_bad.v b/test_regress/t/t_number_bad.v
index 0ed4ef7a2..736a4c45e 100644
--- a/test_regress/t/t_number_bad.v
+++ b/test_regress/t/t_number_bad.v
@@ -13,4 +13,7 @@ module t (/*AUTOARG*/);
    parameter integer FOO5 = 32'b2;
    parameter integer FOO6 = 32'o8;
 
+   // See bug2432, this is questionable, some simulators take this, others do not
+   parameter logic [3:0] FOO7 = 1'b1?4'hF:4'h1;  // bug2432 - intentionally no spaces near ?
+
 endmodule