diff --git a/src/test/java/org/scribe/builder/ServiceBuilderTest.java b/src/test/java/org/scribe/builder/ServiceBuilderTest.java
new file mode 100644
index 0000000..bac2d34
--- /dev/null
+++ b/src/test/java/org/scribe/builder/ServiceBuilderTest.java
@@ -0,0 +1,66 @@
+package org.scribe.builder;
+
+import static org.junit.Assert.*;
+
+import org.junit.*;
+import org.scribe.builder.api.*;
+import org.scribe.model.*;
+import org.scribe.oauth.*;
+
+public class ServiceBuilderTest
+{
+  private ServiceBuilder builder;
+
+  @Before
+  public void setup()
+  {
+    builder = new ServiceBuilder();
+  }
+
+  @Test
+  public void shouldReturnOOBasDefaultCallback()
+  {
+    builder.provider(ApiMock.class).apiKey("key").apiSecret("secret").build();
+    assertEquals(ApiMock.config.getApiKey(), "key");
+    assertEquals(ApiMock.config.getApiSecret(), "secret");
+    assertEquals(ApiMock.config.getCallback(), OAuthConstants.OUT_OF_BAND);
+  }
+
+  @Test
+  public void shouldAcceptValidCallbackUrl()
+  {
+    builder.provider(ApiMock.class).apiKey("key").apiSecret("secret").callback("http://example.com").build();
+    assertEquals(ApiMock.config.getApiKey(), "key");
+    assertEquals(ApiMock.config.getApiSecret(), "secret");
+    assertEquals(ApiMock.config.getCallback(), "http://example.com");
+  }
+
+  @Test(expected=IllegalArgumentException.class)
+  public void shouldNotAcceptAnInvalidUrlAsCallback()
+  {
+    builder.provider(ApiMock.class).apiKey("key").apiSecret("secret").callback("example.com").build(); 
+  }
+
+  @Test
+  public void shouldAcceptAnScope()
+  {
+    builder.provider(ApiMock.class).apiKey("key").apiSecret("secret").scope("rss-api").build();
+    assertEquals(ApiMock.config.getApiKey(), "key");
+    assertEquals(ApiMock.config.getApiSecret(), "secret");
+    assertEquals(ApiMock.scope, "rss-api");
+  }
+
+  public static class ApiMock implements Api
+  {
+    public static OAuthConfig config;
+    public static String scope;
+    
+    @Override
+    public OAuthService createService(OAuthConfig config, String scope)
+    {
+      ApiMock.config = config;
+      ApiMock.scope = scope;
+      return null;
+    }
+  }
+}