diff --git a/src/build/arch/x64/Jump_test.go b/src/build/arch/x64/Jump_test.go
index ba48db0..5c12133 100644
--- a/src/build/arch/x64/Jump_test.go
+++ b/src/build/arch/x64/Jump_test.go
@@ -7,7 +7,7 @@ import (
 	"git.akyoto.dev/go/assert"
 )
 
-func TestJump8(t *testing.T) {
+func TestJump(t *testing.T) {
 	usagePatterns := []struct {
 		Offset int8
 		Code   []byte
@@ -29,3 +29,12 @@ func TestJump8(t *testing.T) {
 		assert.DeepEqual(t, code, pattern.Code)
 	}
 }
+
+func TestConditionalJump(t *testing.T) {
+	assert.DeepEqual(t, x64.Jump8IfEqual(nil, 1), []byte{0x74, 0x01})
+	assert.DeepEqual(t, x64.Jump8IfNotEqual(nil, 1), []byte{0x75, 0x01})
+	assert.DeepEqual(t, x64.Jump8IfLess(nil, 1), []byte{0x7C, 0x01})
+	assert.DeepEqual(t, x64.Jump8IfGreaterOrEqual(nil, 1), []byte{0x7D, 0x01})
+	assert.DeepEqual(t, x64.Jump8IfLessOrEqual(nil, 1), []byte{0x7E, 0x01})
+	assert.DeepEqual(t, x64.Jump8IfGreater(nil, 1), []byte{0x7F, 0x01})
+}