diff --git a/test/unit/ntriples_star_decoder_test.exs b/test/unit/ntriples_star_decoder_test.exs
new file mode 100644
index 0000000..0db912b
--- /dev/null
+++ b/test/unit/ntriples_star_decoder_test.exs
@@ -0,0 +1,18 @@
+defmodule RDF.Star.NTriples.DecoderTest do
+  use RDF.Test.Case
+
+  alias RDF.NTriples
+
+  test "nested quoted triples" do
+    assert NTriples.Decoder.decode!("""
+           << << <http://example.com/s1> <http://example.com/p1> <http://example.com/o1> >> <http://example.com/q1> << <http://example.com/s2> <http://example.com/p2> <http://example.com/o2> >> >> <http://example.com/q2> << << <http://example.com/s3> <http://example.com/p3> <http://example.com/o3> >> <http://example.com/q3> << <http://example.com/s4> <http://example.com/p4> <http://example.com/o4> >> >> .
+           """) ==
+             Graph.new([
+               {
+                 {{EX.s1(), EX.p1(), EX.o1()}, EX.q1(), {EX.s2(), EX.p2(), EX.o2()}},
+                 EX.q2(),
+                 {{EX.s3(), EX.p3(), EX.o3()}, EX.q3(), {EX.s4(), EX.p4(), EX.o4()}}
+               }
+             ])
+  end
+end
diff --git a/test/unit/ntriples_star_encoder_test.exs b/test/unit/ntriples_star_encoder_test.exs
index 004a636..8737bf8 100644
--- a/test/unit/ntriples_star_encoder_test.exs
+++ b/test/unit/ntriples_star_encoder_test.exs
@@ -3,14 +3,14 @@ defmodule RDF.Star.NTriples.EncoderTest do
 
   alias RDF.NTriples
 
-  test "annotations of triples on subject position" do
+  test "quoted triples on subject position" do
     assert NTriples.Encoder.encode!(graph_with_annotation()) ==
              """
              << <http://example.com/S> <http://example.com/P> "Foo" >> <http://example.com/ap> <http://example.com/ao> .
              """
   end
 
-  test "annotations of triples on object position" do
+  test "quoted triples on object position" do
     assert NTriples.Encoder.encode!(
              Graph.new([
                statement(),
@@ -22,4 +22,19 @@ defmodule RDF.Star.NTriples.EncoderTest do
              <http://example.com/S> <http://example.com/P> "Foo" .
              """
   end
+
+  test "nested quoted triples" do
+    assert NTriples.Encoder.encode!(
+             Graph.new([
+               {
+                 {{EX.s1(), EX.p1(), EX.o1()}, EX.q1(), {EX.s2(), EX.p2(), EX.o2()}},
+                 EX.q2(),
+                 {{EX.s3(), EX.p3(), EX.o3()}, EX.q3(), {EX.s4(), EX.p4(), EX.o4()}}
+               }
+             ])
+           ) ==
+             """
+             << << <http://example.com/s1> <http://example.com/p1> <http://example.com/o1> >> <http://example.com/q1> << <http://example.com/s2> <http://example.com/p2> <http://example.com/o2> >> >> <http://example.com/q2> << << <http://example.com/s3> <http://example.com/p3> <http://example.com/o3> >> <http://example.com/q3> << <http://example.com/s4> <http://example.com/p4> <http://example.com/o4> >> >> .
+             """
+  end
 end