diff --git a/tests/verific/blackbox_empty.ys b/tests/verific/blackbox_empty.ys
new file mode 100644
index 000000000..fb407fe06
--- /dev/null
+++ b/tests/verific/blackbox_empty.ys
@@ -0,0 +1,17 @@
+verific -sv  <<EOF
+module TEST_CELL(input clk, input a, input b, output reg c);
+parameter PATH = "DEFAULT";
+endmodule
+EOF
+
+verific -sv <<EOF
+module top(input clk, input a, input b, output c, output d);
+	TEST_CELL  #(.PATH("TEST")) test1(.clk(clk),.a(a),.b(1'b1),.c(c));
+	TEST_CELL  #(.PATH("DEFAULT")) test2(.clk(clk),.a(a),.b(1'bx),.c(d));
+endmodule
+EOF
+
+verific -import top
+hierarchy -top top
+stat
+select -assert-count 2 t:TEST_CELL
diff --git a/tests/verific/blackbox_ql.ys b/tests/verific/blackbox_ql.ys
new file mode 100644
index 000000000..1c6d43587
--- /dev/null
+++ b/tests/verific/blackbox_ql.ys
@@ -0,0 +1,41 @@
+verific -sv -lib +/quicklogic/qlf_k6n10f/dsp_sim.v 
+
+verific -sv <<EOF
+module top (
+    input  wire [19:0] a,
+    input  wire [17:0] b,
+    output wire [37:0] z,
+    input  wire       clk,
+    input  wire       reset,
+    input  wire       unsigned_a,
+    input  wire       unsigned_b,
+    input  wire       f_mode,
+    input  wire [2:0] output_select,
+    input  wire       register_inputs
+);
+	
+// module instantiation
+QL_DSP2_MULT_REGIN_REGOUT #(
+    .MODE_BITS(80'h1232324)
+) u1 (
+    .a (a),
+    .b (b),
+    .z (z),
+    .clk (clk),
+    .reset (reset),
+
+    .unsigned_a (unsigned_a),
+    .unsigned_b (unsigned_b),
+
+    .f_mode (f_mode),
+    .output_select (output_select),
+    .register_inputs (register_inputs)
+);
+endmodule
+
+EOF
+
+verific -import top
+hierarchy -top top
+synth_quicklogic -family qlf_k6n10f
+select -assert-count 1 t:QL_DSP2_MULT_REGIN_REGOUT a:MODE_BITS=80'h1232324