diff --git a/dec_imp_tb.v b/dec_imp_tb.v
new file mode 100644
index 0000000..d43f8da
--- /dev/null
+++ b/dec_imp_tb.v
@@ -0,0 +1,28 @@
+module dec_imp_tb;
+    reg a;
+    reg b;
+    reg c;
+    wire d0;
+    wire d1;
+    wire d2;
+    wire d3;
+    wire d4;
+    wire d5;
+    wire d6;
+    wire d7;
+    wire f1;
+    wire f2;
+    wire f3;
+    dec_imp uut(.a(a),.b(b),.c(c),.d0(d0),.d1(d1),.d2(d2),.d3(d3),.d4(d4),.d5(d5),.d6(d6),.d7(d7),.f1(f1),.f2(f2),.f3(f3));
+    initial
+    begin
+    a=0;b=0;c=0;#100;
+    a=0;b=0;c=1;#100;
+    a=0;b=1;c=0;#100;
+    a=0;b=1;c=1;#100;
+    a=1;b=0;c=0;#100;
+    a=1;b=0;c=1;#100;
+    a=1;b=1;c=0;#100;
+    a=1;b=1;c=1;#100;
+    end
+endmodule