diff --git a/tests/various/wreduce.ys b/tests/various/wreduce.ys
index ee03e008d..f9e5ed4e3 100644
--- a/tests/various/wreduce.ys
+++ b/tests/various/wreduce.ys
@@ -1,6 +1,6 @@
 
 read_verilog <<EOT
-module wreduce_add_test(input [3:0] i, input [7:0] j, output [7:0] o);
+module wreduce_add_test(input [3:0] i, input [7:0] j, output [8:0] o);
     assign o = (i << 4) + j;
 endmodule
 EOT
@@ -11,7 +11,7 @@ design -save gold
 
 prep
 
-select -assert-count 1 t:$add r:A_WIDTH=4 r:B_WIDTH=4 %i %i
+select -assert-count 1 t:$add r:A_WIDTH=4 r:B_WIDTH=4 r:Y_WIDTH=5 %i %i %i
 
 design -stash gate
 
@@ -24,7 +24,7 @@ sat -verify -prove-asserts -show-ports miter
 
 ### X - 0
 read_verilog <<EOT
-module wreduce_sub_test1(input [3:0] i, input [7:0] j, output [7:0] o);
+module wreduce_sub_test1(input [3:0] i, input [7:0] j, output [8:0] o);
     assign o = j - (i << 4);
 endmodule
 EOT
@@ -35,7 +35,7 @@ design -save gold
 
 prep
 
-select -assert-count 1 t:$sub r:A_WIDTH=4 r:B_WIDTH=4 %i %i
+select -assert-count 1 t:$sub r:A_WIDTH=4 r:B_WIDTH=4 r:Y_WIDTH=5 %i %i %i
 
 design -stash gate
 
@@ -47,7 +47,7 @@ sat -verify -prove-asserts -show-ports miter
 
 ### 0 - X
 read_verilog <<EOT
-module wreduce_sub_test1(input [3:0] i, input [7:0] j, output [7:0] o);
+module wreduce_sub_test1(input [3:0] i, input [7:0] j, output [8:0] o);
     assign o = (i << 4) - j;
 endmodule
 EOT
@@ -58,7 +58,30 @@ design -save gold
 
 prep
 
-select -assert-count 1 t:$sub r:A_WIDTH=8 r:B_WIDTH=8 %i %i
+select -assert-count 1 t:$sub r:A_WIDTH=8 r:B_WIDTH=8 r:Y_WIDTH=9 %i %i %i
+
+design -stash gate
+
+design -import gold -as gold
+design -import gate -as gate
+
+miter -equiv -flatten -make_assert -make_outputs gold gate miter
+sat -verify -prove-asserts -show-ports miter
+
+### 0 - X
+read_verilog <<EOT
+module wreduce_sub_test1(input [3:0] i, input [7:0] j, output [8:0] o);
+    assign o = (i << 4) - j;
+endmodule
+EOT
+
+hierarchy -auto-top
+proc
+design -save gold
+
+prep
+
+select -assert-count 1 t:$sub r:A_WIDTH=8 r:B_WIDTH=8 r:Y_WIDTH=9 %i %i %i
 
 design -stash gate