diff --git a/test/opcode_test.go b/test/opcode_test.go
index 7068f51..f9518d5 100644
--- a/test/opcode_test.go
+++ b/test/opcode_test.go
@@ -154,6 +154,24 @@ functions:
 	expectGlobalMemory(t, state, 1, 3)
 }
 
+func TestLTS(t *testing.T) {
+	state := assembleAndExecute(t, `
+functions:
+- - [mov, g0, 0]
+  - [lts, g0, -1]
+  - [jmpt, +2]
+  - [add, g1, 1]
+  - [lts, g0, 0]
+  - [jmpt, +2]
+  - [add, g1, 2]
+  - [lts, g0, 1]
+  - [jmpt, +2]
+  - [add, g1, 4]
+`)
+
+	expectGlobalMemory(t, state, 1, 3)
+}
+
 func TestGTU(t *testing.T) {
 	state := assembleAndExecute(t, `
 functions:
@@ -172,6 +190,24 @@ functions:
 	expectGlobalMemory(t, state, 1, 6)
 }
 
+func TestGTS(t *testing.T) {
+	state := assembleAndExecute(t, `
+functions:
+- - [mov, g0, 0]
+  - [gts, g0, -1]
+  - [jmpt, +2]
+  - [add, g1, 1]
+  - [gts, g0, 0]
+  - [jmpt, +2]
+  - [add, g1, 2]
+  - [gts, g0, 1]
+  - [jmpt, +2]
+  - [add, g1, 4]
+`)
+
+	expectGlobalMemory(t, state, 1, 6)
+}
+
 func TestLTEU(t *testing.T) {
 	state := assembleAndExecute(t, `
 functions:
@@ -190,6 +226,24 @@ functions:
 	expectGlobalMemory(t, state, 1, 1)
 }
 
+func TestLTES(t *testing.T) {
+	state := assembleAndExecute(t, `
+functions:
+- - [mov, g0, 0]
+  - [ltes, g0, -1]
+  - [jmpt, +2]
+  - [add, g1, 1]
+  - [ltes, g0, 0]
+  - [jmpt, +2]
+  - [add, g1, 2]
+  - [ltes, g0, 1]
+  - [jmpt, +2]
+  - [add, g1, 4]
+`)
+
+	expectGlobalMemory(t, state, 1, 1)
+}
+
 func TestGTEU(t *testing.T) {
 	state := assembleAndExecute(t, `
 functions:
@@ -207,3 +261,21 @@ functions:
 
 	expectGlobalMemory(t, state, 1, 4)
 }
+
+func TestGTES(t *testing.T) {
+	state := assembleAndExecute(t, `
+functions:
+- - [mov, g0, 0]
+  - [gtes, g0, -1]
+  - [jmpt, +2]
+  - [add, g1, 1]
+  - [gtes, g0, 0]
+  - [jmpt, +2]
+  - [add, g1, 2]
+  - [gtes, g0, 1]
+  - [jmpt, +2]
+  - [add, g1, 4]
+`)
+
+	expectGlobalMemory(t, state, 1, 4)
+}