diff --git a/session/container_test.go b/session/container_test.go
index c35ba41..cb908cd 100644
--- a/session/container_test.go
+++ b/session/container_test.go
@@ -535,3 +535,11 @@ func TestContainer_Issuer(t *testing.T) {
 
 	require.True(t, token.Issuer().Equals(issuer))
 }
+
+func TestContainer_Sign(t *testing.T) {
+	val := sessiontest.Container()
+
+	require.NoError(t, val.Sign(randSigner()))
+
+	require.True(t, val.VerifySignature())
+}
diff --git a/session/object_test.go b/session/object_test.go
index 5c7360c..c266850 100644
--- a/session/object_test.go
+++ b/session/object_test.go
@@ -626,3 +626,11 @@ func TestObject_Issuer(t *testing.T) {
 
 	require.True(t, token.Issuer().Equals(issuer))
 }
+
+func TestObject_Sign(t *testing.T) {
+	val := sessiontest.Object()
+
+	require.NoError(t, val.Sign(randSigner()))
+
+	require.True(t, val.VerifySignature())
+}