diff --git a/core/api/src/test/java/org/onlab/onos/net/device/DeviceServiceAdapter.java b/core/api/src/test/java/org/onlab/onos/net/device/DeviceServiceAdapter.java
new file mode 100644
index 0000000..bfb28f6
--- /dev/null
+++ b/core/api/src/test/java/org/onlab/onos/net/device/DeviceServiceAdapter.java
@@ -0,0 +1,58 @@
+package org.onlab.onos.net.device;
+
+import org.onlab.onos.net.Device;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.MastershipRole;
+import org.onlab.onos.net.Port;
+import org.onlab.onos.net.PortNumber;
+
+import java.util.List;
+
+/**
+ * Test adapter for device service.
+ */
+public class DeviceServiceAdapter implements DeviceService {
+    @Override
+    public int getDeviceCount() {
+        return 0;
+    }
+
+    @Override
+    public Iterable<Device> getDevices() {
+        return null;
+    }
+
+    @Override
+    public Device getDevice(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public MastershipRole getRole(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public List<Port> getPorts(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public Port getPort(DeviceId deviceId, PortNumber portNumber) {
+        return null;
+    }
+
+    @Override
+    public boolean isAvailable(DeviceId deviceId) {
+        return false;
+    }
+
+    @Override
+    public void addListener(DeviceListener listener) {
+    }
+
+    @Override
+    public void removeListener(DeviceListener listener) {
+    }
+
+}
diff --git a/core/api/src/test/java/org/onlab/onos/net/host/HostServiceAdapter.java b/core/api/src/test/java/org/onlab/onos/net/host/HostServiceAdapter.java
new file mode 100644
index 0000000..54a630e
--- /dev/null
+++ b/core/api/src/test/java/org/onlab/onos/net/host/HostServiceAdapter.java
@@ -0,0 +1,65 @@
+package org.onlab.onos.net.host;
+
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.Host;
+import org.onlab.onos.net.HostId;
+import org.onlab.packet.IPAddress;
+import org.onlab.packet.MACAddress;
+import org.onlab.packet.VLANID;
+
+import java.util.Set;
+
+/**
+ * Test adapter for host service.
+ */
+public class HostServiceAdapter implements HostService {
+    @Override
+    public int getHostCount() {
+        return 0;
+    }
+
+    @Override
+    public Iterable<Host> getHosts() {
+        return null;
+    }
+
+    @Override
+    public Host getHost(HostId hostId) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getHostsByVlan(VLANID vlanId) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getHostsByMac(MACAddress mac) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getHostsByIp(IPAddress ip) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getConnectedHosts(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public void addListener(HostListener listener) {
+    }
+
+    @Override
+    public void removeListener(HostListener listener) {
+    }
+
+}
diff --git a/core/api/src/test/java/org/onlab/onos/net/link/LinkServiceAdapter.java b/core/api/src/test/java/org/onlab/onos/net/link/LinkServiceAdapter.java
new file mode 100644
index 0000000..fd3aa0c
--- /dev/null
+++ b/core/api/src/test/java/org/onlab/onos/net/link/LinkServiceAdapter.java
@@ -0,0 +1,66 @@
+package org.onlab.onos.net.link;
+
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.Link;
+
+import java.util.Set;
+
+/**
+ * Test adapter for link service.
+ */
+public class LinkServiceAdapter implements LinkService {
+    @Override
+    public int getLinkCount() {
+        return 0;
+    }
+
+    @Override
+    public Iterable<Link> getLinks() {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getDeviceLinks(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getDeviceEgressLinks(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getDeviceIngressLinks(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getLinks(ConnectPoint connectPoint) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getEgressLinks(ConnectPoint connectPoint) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getIngressLinks(ConnectPoint connectPoint) {
+        return null;
+    }
+
+    @Override
+    public Link getLink(ConnectPoint src, ConnectPoint dst) {
+        return null;
+    }
+
+    @Override
+    public void addListener(LinkListener listener) {
+    }
+
+    @Override
+    public void removeListener(LinkListener listener) {
+    }
+
+}
diff --git a/core/api/src/test/java/org/onlab/onos/net/topology/TopologyServiceAdapter.java b/core/api/src/test/java/org/onlab/onos/net/topology/TopologyServiceAdapter.java
new file mode 100644
index 0000000..cfc22e0
--- /dev/null
+++ b/core/api/src/test/java/org/onlab/onos/net/topology/TopologyServiceAdapter.java
@@ -0,0 +1,77 @@
+package org.onlab.onos.net.topology;
+
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.Link;
+import org.onlab.onos.net.Path;
+
+import java.util.Set;
+
+/**
+ * Test adapter for topology service.
+ */
+public class TopologyServiceAdapter implements TopologyService {
+    @Override
+    public Topology currentTopology() {
+        return null;
+    }
+
+    @Override
+    public boolean isLatest(Topology topology) {
+        return false;
+    }
+
+    @Override
+    public TopologyGraph getGraph(Topology topology) {
+        return null;
+    }
+
+    @Override
+    public Set<TopologyCluster> getClusters(Topology topology) {
+        return null;
+    }
+
+    @Override
+    public TopologyCluster getCluster(Topology topology, ClusterId clusterId) {
+        return null;
+    }
+
+    @Override
+    public Set<DeviceId> getClusterDevices(Topology topology, TopologyCluster cluster) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getClusterLinks(Topology topology, TopologyCluster cluster) {
+        return null;
+    }
+
+    @Override
+    public Set<Path> getPaths(Topology topology, DeviceId src, DeviceId dst) {
+        return null;
+    }
+
+    @Override
+    public Set<Path> getPaths(Topology topology, DeviceId src, DeviceId dst, LinkWeight weight) {
+        return null;
+    }
+
+    @Override
+    public boolean isInfrastructure(Topology topology, ConnectPoint connectPoint) {
+        return false;
+    }
+
+    @Override
+    public boolean isBroadcastPoint(Topology topology, ConnectPoint connectPoint) {
+        return false;
+    }
+
+    @Override
+    public void addListener(TopologyListener listener) {
+    }
+
+    @Override
+    public void removeListener(TopologyListener listener) {
+    }
+
+}
diff --git a/of/api/src/test/java/org/onlab/onos/of/controller/OpenflowControllerAdapter.java b/of/api/src/test/java/org/onlab/onos/of/controller/OpenflowControllerAdapter.java
new file mode 100644
index 0000000..09c0fbe
--- /dev/null
+++ b/of/api/src/test/java/org/onlab/onos/of/controller/OpenflowControllerAdapter.java
@@ -0,0 +1,66 @@
+package org.onlab.onos.of.controller;
+
+import org.projectfloodlight.openflow.protocol.OFMessage;
+
+/**
+ * Test adapter for the OpenFlow controller interface.
+ */
+public class OpenflowControllerAdapter implements OpenFlowController {
+    @Override
+    public Iterable<OpenFlowSwitch> getSwitches() {
+        return null;
+    }
+
+    @Override
+    public Iterable<OpenFlowSwitch> getMasterSwitches() {
+        return null;
+    }
+
+    @Override
+    public Iterable<OpenFlowSwitch> getEqualSwitches() {
+        return null;
+    }
+
+    @Override
+    public OpenFlowSwitch getSwitch(Dpid dpid) {
+        return null;
+    }
+
+    @Override
+    public OpenFlowSwitch getMasterSwitch(Dpid dpid) {
+        return null;
+    }
+
+    @Override
+    public OpenFlowSwitch getEqualSwitch(Dpid dpid) {
+        return null;
+    }
+
+    @Override
+    public void addListener(OpenFlowSwitchListener listener) {
+    }
+
+    @Override
+    public void removeListener(OpenFlowSwitchListener listener) {
+    }
+
+    @Override
+    public void addPacketListener(int priority, PacketListener listener) {
+    }
+
+    @Override
+    public void removePacketListener(PacketListener listener) {
+    }
+
+    @Override
+    public void write(Dpid dpid, OFMessage msg) {
+    }
+
+    @Override
+    public void processPacket(Dpid dpid, OFMessage msg) {
+    }
+
+    @Override
+    public void setRole(Dpid dpid, RoleState role) {
+    }
+}
diff --git a/pom.xml b/pom.xml
index f461357..b913040 100644
--- a/pom.xml
+++ b/pom.xml
@@ -144,10 +144,24 @@
             </dependency>
             <dependency>
                 <groupId>org.onlab.onos</groupId>
+                <artifactId>onos-api</artifactId>
+                <version>${project.version}</version>
+                <classifier>tests</classifier>
+                <scope>test</scope>
+            </dependency>
+
+            <dependency>
+                <groupId>org.onlab.onos</groupId>
                 <artifactId>onos-of-api</artifactId>
                 <version>${project.version}</version>
             </dependency>
-
+            <dependency>
+                <groupId>org.onlab.onos</groupId>
+                <artifactId>onos-of-api</artifactId>
+                <version>${project.version}</version>
+                <classifier>tests</classifier>
+                <scope>test</scope>
+            </dependency>
         </dependencies>
     </dependencyManagement>
 
diff --git a/providers/of/host/src/test/java/org/onlab/onos/provider/of/host/impl/OpenFlowHostProviderTest.java b/providers/of/host/src/test/java/org/onlab/onos/provider/of/host/impl/OpenFlowHostProviderTest.java
index dd102e8..fbc086c 100644
--- a/providers/of/host/src/test/java/org/onlab/onos/provider/of/host/impl/OpenFlowHostProviderTest.java
+++ b/providers/of/host/src/test/java/org/onlab/onos/provider/of/host/impl/OpenFlowHostProviderTest.java
@@ -1,39 +1,22 @@
 package org.onlab.onos.provider.of.host.impl;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-
-import java.util.Set;
-
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.onlab.onos.net.ConnectPoint;
-import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.HostId;
-import org.onlab.onos.net.Link;
-import org.onlab.onos.net.Path;
 import org.onlab.onos.net.host.HostDescription;
 import org.onlab.onos.net.host.HostProvider;
 import org.onlab.onos.net.host.HostProviderRegistry;
 import org.onlab.onos.net.host.HostProviderService;
 import org.onlab.onos.net.provider.AbstractProviderService;
 import org.onlab.onos.net.provider.ProviderId;
-import org.onlab.onos.net.topology.ClusterId;
-import org.onlab.onos.net.topology.LinkWeight;
 import org.onlab.onos.net.topology.Topology;
-import org.onlab.onos.net.topology.TopologyCluster;
-import org.onlab.onos.net.topology.TopologyGraph;
-import org.onlab.onos.net.topology.TopologyListener;
-import org.onlab.onos.net.topology.TopologyService;
+import org.onlab.onos.net.topology.TopologyServiceAdapter;
 import org.onlab.onos.of.controller.Dpid;
-import org.onlab.onos.of.controller.OpenFlowController;
 import org.onlab.onos.of.controller.OpenFlowPacketContext;
-import org.onlab.onos.of.controller.OpenFlowSwitch;
-import org.onlab.onos.of.controller.OpenFlowSwitchListener;
+import org.onlab.onos.of.controller.OpenflowControllerAdapter;
 import org.onlab.onos.of.controller.PacketListener;
-import org.onlab.onos.of.controller.RoleState;
 import org.onlab.packet.ARP;
 import org.onlab.packet.Ethernet;
 import org.onlab.packet.MACAddress;
@@ -41,6 +24,10 @@
 import org.projectfloodlight.openflow.protocol.OFMessage;
 import org.projectfloodlight.openflow.types.OFPort;
 
+import java.util.Set;
+
+import static org.junit.Assert.*;
+
 public class OpenFlowHostProviderTest {
 
     private static final Integer INPORT = 10;
@@ -145,124 +132,22 @@
 
     }
 
-    private class TestController implements OpenFlowController {
-
+    private class TestController extends OpenflowControllerAdapter {
         PacketListener pktListener;
 
         @Override
-        public Iterable<OpenFlowSwitch> getSwitches() {
-            return null;
-        }
-
-        @Override
-        public Iterable<OpenFlowSwitch> getMasterSwitches() {
-            return null;
-        }
-
-        @Override
-        public Iterable<OpenFlowSwitch> getEqualSwitches() {
-            return null;
-        }
-
-        @Override
-        public OpenFlowSwitch getSwitch(Dpid dpid) {
-            return null;
-        }
-
-        @Override
-        public OpenFlowSwitch getMasterSwitch(Dpid dpid) {
-            return null;
-        }
-
-        @Override
-        public OpenFlowSwitch getEqualSwitch(Dpid dpid) {
-            return null;
-        }
-
-        @Override
-        public void addListener(OpenFlowSwitchListener listener) {
-        }
-
-        @Override
-        public void removeListener(OpenFlowSwitchListener listener) {
-        }
-
-        @Override
         public void addPacketListener(int priority, PacketListener listener) {
             pktListener = listener;
         }
 
         @Override
-        public void removePacketListener(PacketListener listener) {
-        }
-
-        @Override
-        public void write(Dpid dpid, OFMessage msg) {
-        }
-
-        @Override
         public void processPacket(Dpid dpid, OFMessage msg) {
-            OpenFlowPacketContext ctx =
-                    new TestPacketContext(dpid);
-
+            OpenFlowPacketContext ctx = new TestPacketContext(dpid);
             pktListener.handlePacket(ctx);
         }
-
-        @Override
-        public void setRole(Dpid dpid, RoleState role) {
-        }
     }
 
-    private class TestTopologyService implements TopologyService {
-
-        @Override
-        public Topology currentTopology() {
-            return null;
-        }
-
-        @Override
-        public boolean isLatest(Topology topology) {
-            return false;
-        }
-
-        @Override
-        public TopologyGraph getGraph(Topology topology) {
-            return null;
-        }
-
-        @Override
-        public Set<TopologyCluster> getClusters(Topology topology) {
-            return null;
-        }
-
-        @Override
-        public TopologyCluster getCluster(Topology topology, ClusterId clusterId) {
-            return null;
-        }
-
-        @Override
-        public Set<DeviceId> getClusterDevices(Topology topology,
-                                               TopologyCluster cluster) {
-            return null;
-        }
-
-        @Override
-        public Set<Link> getClusterLinks(Topology topology,
-                                         TopologyCluster cluster) {
-            return null;
-        }
-
-        @Override
-        public Set<Path> getPaths(Topology topology, DeviceId src, DeviceId dst) {
-            return null;
-        }
-
-        @Override
-        public Set<Path> getPaths(Topology topology, DeviceId src,
-                                  DeviceId dst, LinkWeight weight) {
-            return null;
-        }
-
+    private class TestTopologyService extends TopologyServiceAdapter {
         @Override
         public boolean isInfrastructure(Topology topology,
                                         ConnectPoint connectPoint) {
@@ -272,21 +157,6 @@
             }
             return false;
         }
-
-        @Override
-        public boolean isBroadcastPoint(Topology topology,
-                                        ConnectPoint connectPoint) {
-            return false;
-        }
-
-        @Override
-        public void addListener(TopologyListener listener) {
-        }
-
-        @Override
-        public void removeListener(TopologyListener listener) {
-        }
-
     }
 
     private class TestPacketContext implements OpenFlowPacketContext {
diff --git a/providers/of/pom.xml b/providers/of/pom.xml
index 901cdd6..fd03891 100644
--- a/providers/of/pom.xml
+++ b/providers/of/pom.xml
@@ -28,6 +28,19 @@
             <groupId>org.onlab.onos</groupId>
             <artifactId>onos-of-api</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.onlab.onos</groupId>
+            <artifactId>onos-of-api</artifactId>
+            <classifier>tests</classifier>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.onlab.onos</groupId>
+            <artifactId>onos-api</artifactId>
+            <classifier>tests</classifier>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
 </project>