diff --git a/sbol/interaction.py b/sbol/interaction.py
index 39e4aa1..2ec6099 100644
--- a/sbol/interaction.py
+++ b/sbol/interaction.py
@@ -9,9 +9,9 @@
 
 
 class Interaction(Identified):
-    def __init__(self, rdf_type=SBOL_INTERACTION,
-                 uri='example', interaction_type=SBO_INTERACTION):
-        super().__init__(rdf_type, uri)
+    def __init__(self, uri='example', interaction_type=SBO_INTERACTION,
+                 *, type_uri=SBOL_INTERACTION):
+        super().__init__(type_uri, uri)
         self.functionalComponents = OwnedObject(self,
                                                 SBOL_FUNCTIONAL_COMPONENTS,
                                                 FunctionalComponent,
diff --git a/sbol/test/__init__.py b/sbol/test/__init__.py
index 348be87..6fc7153 100644
--- a/sbol/test/__init__.py
+++ b/sbol/test/__init__.py
@@ -8,6 +8,7 @@
 from .test_error import TestError
 from .test_identified import TestIdentified
 from .test_implementation import TestImplementation
+from .test_interaction import TestInteraction
 from .test_config import TestConfig
 from .test_moduledefinition import TestModuleDefinition
 from .test_object import TestObject
@@ -34,6 +35,7 @@ def runTests(test_list=None):
             TestError,
             TestIdentified,
             TestImplementation,
+            TestInteraction,
             TestModuleDefinition,
             TestObject,
             TestOwnedObject,
diff --git a/sbol/test/test_interaction.py b/sbol/test/test_interaction.py
new file mode 100644
index 0000000..b6de07d
--- /dev/null
+++ b/sbol/test/test_interaction.py
@@ -0,0 +1,82 @@
+import unittest
+
+import rdflib
+
+import sbol
+
+
+class TestInteraction(unittest.TestCase):
+
+    def __init__(self, *args):
+        super().__init__(*args)
+        self.homespace = 'http://example.org'
+
+    def make_identity(self, homespace, name, version, tipe='Interaction'):
+        uri = '{}/{}/{}/{}'
+        return uri.format(homespace, tipe, name, version)
+
+    def setUp(self):
+        # Always reset homespace
+        sbol.setHomespace(self.homespace)
+        sbol.Config.setOption('sbol_typed_uris', True)
+        sbol.Config.setOption('sbol_compliant_uris', True)
+
+    def testEmptyConstructor(self):
+        # This is the default name in the interaction constructor
+        name = 'example'
+        i = sbol.Interaction()
+        expected_identity = self.make_identity(self.homespace, name,
+                                               sbol.VERSION_STRING)
+        self.assertEqual(i.identity, rdflib.URIRef(expected_identity))
+        self.assertEqual(i.displayId, rdflib.Literal(name))
+        self.assertEqual(i.version, rdflib.Literal(sbol.VERSION_STRING))
+        self.assertEqual(i.rdf_type, sbol.SBOL_INTERACTION)
+        md = sbol.ModuleDefinition()
+        md.interactions.add(i)
+        self.assertEqual(len(md.interactions), 1)
+
+    def test1ArgConstructor(self):
+        name = 'foo'
+        i = sbol.Interaction(name)
+        expected_identity = self.make_identity(self.homespace, name,
+                                               sbol.VERSION_STRING)
+        self.assertEqual(i.identity, rdflib.URIRef(expected_identity))
+        self.assertEqual(i.displayId, rdflib.Literal(name))
+        self.assertEqual(i.version, rdflib.Literal(sbol.VERSION_STRING))
+        self.assertEqual(i.rdf_type, sbol.SBOL_INTERACTION)
+        md = sbol.ModuleDefinition()
+        md.interactions.add(i)
+        self.assertEqual(len(md.interactions), 1)
+
+    def test2ArgConstructor(self):
+        name = 'foo'
+        i = sbol.Interaction(name, sbol.SBO_INHIBITION)
+        expected_identity = self.make_identity(self.homespace, name,
+                                               sbol.VERSION_STRING)
+        self.assertEqual(i.identity, rdflib.URIRef(expected_identity))
+        self.assertEqual(i.displayId, rdflib.Literal(name))
+        self.assertEqual(i.types, [sbol.SBO_INHIBITION])
+        self.assertEqual(i.rdf_type, sbol.SBOL_INTERACTION)
+        md = sbol.ModuleDefinition()
+        md.interactions.add(i)
+        self.assertEqual(len(md.interactions), 1)
+
+    def test3ArgConstructor(self):
+        name = 'foo'
+        rdf_type = sbol.SBOL_INTERACTION + '2'
+        i = sbol.Interaction(name, sbol.SBO_INHIBITION, type_uri=rdf_type)
+        expected_identity = self.make_identity(self.homespace, name,
+                                               sbol.VERSION_STRING,
+                                               'Interaction2')
+        self.assertEqual(i.identity, rdflib.URIRef(expected_identity))
+        self.assertEqual(i.displayId, rdflib.Literal(name))
+        self.assertEqual(i.types, [sbol.SBO_INHIBITION])
+        self.assertEqual(i.rdf_type, rdf_type)
+        # Verify that when added to a module definition, this
+        # interaction is in the list of interactions despite having a
+        # different rdf_type. That's because the rdf_type is not taken
+        # into account when adding to the module definition's
+        # ineractions property.
+        md = sbol.ModuleDefinition()
+        md.interactions.add(i)
+        self.assertEqual(len(md.interactions), 1)