diff --git a/examples/ext/synth_shed/tests/test_synth_shed.py b/examples/ext/synth_shed/tests/test_synth_shed.py
index d3be8f2..28bcb87 100644
--- a/examples/ext/synth_shed/tests/test_synth_shed.py
+++ b/examples/ext/synth_shed/tests/test_synth_shed.py
@@ -2,8 +2,40 @@
 # -*- coding: utf-8 -*-
 # This file is under GNU Affero General Public License 3.0
 # see LICENSE.txt
-
+import pytest
+from synth_shed import *
 import synth_shed
 
-def test_synth_shed():
-    synth_shed
+def test_synth_shed_init():
+    init_synth_shed()
+
+# @pytest.mark.skip(reason="")
+def test_Fds() :
+    brand = "Korg"
+    model = "MS20"
+    osc_count = 2
+    s = synth_create(brand,model,osc_count)
+    print("brand:", s.brand)
+    print("model:", s.model)
+    print("osc_count", s.osc_count)
+    print("technolgy:",s.technolgy)
+    print("filter.tech:",s.filter.technology)
+    print("filter.type:",s.filter.type)
+
+    assert s.brand == brand
+    assert s.model == model
+    assert s.osc_count == osc_count
+    assert s.technolgy == synth_shed._tech.ANALOG
+    assert s.filter.technology == synth_shed._tech.ANALOG
+    assert s.filter.type == synth_shed._filtertype.LPF
+
+    print(play_synth(s))
+
+
+def test_tech_to_string():
+    str = tech_to_string(synth_shed._tech.ANALOG)
+    print(str)
+    assert str == "ANALOG"
+    str = tech_to_string(synth_shed._tech.DIGITAL)
+    print(str)
+    assert str == "DIGITAL"