diff --git a/tests/fixtures/ppp-legacy.interfaces b/tests/fixtures/ppp-legacy.interfaces
new file mode 100644
index 0000000..8a83490
--- /dev/null
+++ b/tests/fixtures/ppp-legacy.interfaces
@@ -0,0 +1,4 @@
+auto ppp0
+iface ppp0 inet ppp
+    requires eth0
+    provider someisp
diff --git a/tests/fixtures/ppp.interfaces b/tests/fixtures/ppp.interfaces
new file mode 100644
index 0000000..4d4cb9b
--- /dev/null
+++ b/tests/fixtures/ppp.interfaces
@@ -0,0 +1,4 @@
+auto ppp0
+iface ppp0
+    requires eth0
+    ppp-provider someisp