diff --git a/test/opcode_test.go b/test/opcode_test.go
index 3af78aa..7068f51 100644
--- a/test/opcode_test.go
+++ b/test/opcode_test.go
@@ -153,3 +153,57 @@ functions:
 
 	expectGlobalMemory(t, state, 1, 3)
 }
+
+func TestGTU(t *testing.T) {
+	state := assembleAndExecute(t, `
+functions:
+- - [mov, g0, 5]
+  - [gtu, g0, 4]
+  - [jmpt, +2]
+  - [add, g1, 1]
+  - [gtu, g0, 5]
+  - [jmpt, +2]
+  - [add, g1, 2]
+  - [gtu, g0, 6]
+  - [jmpt, +2]
+  - [add, g1, 4]
+`)
+
+	expectGlobalMemory(t, state, 1, 6)
+}
+
+func TestLTEU(t *testing.T) {
+	state := assembleAndExecute(t, `
+functions:
+- - [mov, g0, 5]
+  - [lteu, g0, 4]
+  - [jmpt, +2]
+  - [add, g1, 1]
+  - [lteu, g0, 5]
+  - [jmpt, +2]
+  - [add, g1, 2]
+  - [lteu, g0, 6]
+  - [jmpt, +2]
+  - [add, g1, 4]
+`)
+
+	expectGlobalMemory(t, state, 1, 1)
+}
+
+func TestGTEU(t *testing.T) {
+	state := assembleAndExecute(t, `
+functions:
+- - [mov, g0, 5]
+  - [gteu, g0, 4]
+  - [jmpt, +2]
+  - [add, g1, 1]
+  - [gteu, g0, 5]
+  - [jmpt, +2]
+  - [add, g1, 2]
+  - [gteu, g0, 6]
+  - [jmpt, +2]
+  - [add, g1, 4]
+`)
+
+	expectGlobalMemory(t, state, 1, 4)
+}