diff --git a/test/dgraph7.txt b/test/dgraph7.txt
new file mode 100644
index 0000000..16fafd5
--- /dev/null
+++ b/test/dgraph7.txt
@@ -0,0 +1,13 @@
+graph directed
+n0 n1 30
+n0 n2 10
+n1 n3 25
+n1 n4 10
+n2 n4 9
+n2 n5 15
+n3 n6 27
+n4 n6 7
+n4 n7 16
+n4 n5 8
+n6 n7 5
+n5 n7 35
diff --git a/test/dgraph8.txt b/test/dgraph8.txt
new file mode 100644
index 0000000..3d85488
--- /dev/null
+++ b/test/dgraph8.txt
@@ -0,0 +1,17 @@
+graph directed
+A E
+A H
+B A
+B G
+C D
+D F
+E D
+E J
+F C
+F I
+G F
+H C
+H I
+I G
+J B
+J H