diff --git a/08test_bltz.asm b/08test_bltz.asm
new file mode 100644
index 0000000..0314ede
--- /dev/null
+++ b/08test_bltz.asm
@@ -0,0 +1,18 @@
+    addi    $s1,    $zero,  -2
+    nop     
+    nop     
+    nop     
+    nop     
+start:
+    addi    $s1,    $s1,    1
+    nop     
+    nop     
+    nop     
+    nop     
+    bltz    $s1,    start
+    nop     
+    nop     
+    nop     
+    nop     
+end:
+    j       end
\ No newline at end of file
diff --git a/08test_bltz.txt b/08test_bltz.txt
new file mode 100644
index 0000000..1ea236b
--- /dev/null
+++ b/08test_bltz.txt
@@ -0,0 +1,16 @@
+20'd0: instruction <= 32'h2011fffe; //     addi    $s1,    $zero,  2
+20'd1: instruction <= 32'h00000000;
+20'd2: instruction <= 32'h00000000;
+20'd3: instruction <= 32'h00000000;
+20'd4: instruction <= 32'h00000000; // start:
+20'd5: instruction <= 32'h22310001; //     addi    $s1,    $s1,    -1
+20'd6: instruction <= 32'h00000000;
+20'd7: instruction <= 32'h00000000;
+20'd8: instruction <= 32'h00000000;
+20'd9: instruction <= 32'h00000000;
+20'd10: instruction <= 32'h0620fffa; //     bgtz    $s1,    start
+20'd11: instruction <= 32'h00000000;
+20'd12: instruction <= 32'h00000000;
+20'd13: instruction <= 32'h00000000;
+20'd14: instruction <= 32'h00000000; // end:
+20'd15: instruction <= 32'h0800000f; //     j       end
\ No newline at end of file
diff --git a/08test_bltz_mars.txt b/08test_bltz_mars.txt
new file mode 100644
index 0000000..28b885c
--- /dev/null
+++ b/08test_bltz_mars.txt
@@ -0,0 +1,16 @@
+2011fffe
+00000000
+00000000
+00000000
+00000000
+22310001
+00000000
+00000000
+00000000
+00000000
+0620fffa
+00000000
+00000000
+00000000
+00000000
+0800000f