diff --git a/pdf2d/samples_test.go b/pdf2d/samples_test.go
index 302c78e..77f0d44 100644
--- a/pdf2d/samples_test.go
+++ b/pdf2d/samples_test.go
@@ -12,6 +12,7 @@ import (
 	"github.com/stanim/draw2d.samples/gopher"
 	"github.com/stanim/draw2d.samples/helloworld"
 	"github.com/stanim/draw2d.samples/line"
+	"github.com/stanim/draw2d.samples/linecapjoin"
 )
 
 func TestSampleAndroid(t *testing.T) {
@@ -37,3 +38,7 @@ func TestSampleFrameImage(t *testing.T) {
 func TestSampleLine(t *testing.T) {
 	test(t, line.Main)
 }
+
+func TestSampleLineCap(t *testing.T) {
+	test(t, linecapjoin.Main)
+}
diff --git a/samples_test.go b/samples_test.go
index ae68c14..4b3d749 100644
--- a/samples_test.go
+++ b/samples_test.go
@@ -12,6 +12,7 @@ import (
 	"github.com/stanim/draw2d.samples/gopher"
 	"github.com/stanim/draw2d.samples/helloworld"
 	"github.com/stanim/draw2d.samples/line"
+	"github.com/stanim/draw2d.samples/linecapjoin"
 )
 
 func TestSampleAndroid(t *testing.T) {
@@ -35,3 +36,7 @@ func TestSampleFrameImage(t *testing.T) {
 func TestSampleLine(t *testing.T) {
 	test(t, line.Main)
 }
+
+func TestSampleLineCap(t *testing.T) {
+	test(t, linecapjoin.Main)
+}