diff --git a/src/test/scala/io/ino/solrs/AsyncSolrClientIntegrationSpec.scala b/src/test/scala/io/ino/solrs/AsyncSolrClientIntegrationSpec.scala
index b122669..097073f 100644
--- a/src/test/scala/io/ino/solrs/AsyncSolrClientIntegrationSpec.scala
+++ b/src/test/scala/io/ino/solrs/AsyncSolrClientIntegrationSpec.scala
@@ -79,7 +79,7 @@ class AsyncSolrClientIntegrationSpec extends FunSpec with RunningSolr with Befor
         solrServers(0).status should be (Disabled)
       }
 
-      solr.shutdown
+      solr.shutdown()
     }
 
     it("should be built with LoadBalancer") {
diff --git a/src/test/scala/io/ino/solrs/AsyncSolrClientSpec.scala b/src/test/scala/io/ino/solrs/AsyncSolrClientSpec.scala
index 471eb98..c09c9fd 100644
--- a/src/test/scala/io/ino/solrs/AsyncSolrClientSpec.scala
+++ b/src/test/scala/io/ino/solrs/AsyncSolrClientSpec.scala
@@ -33,7 +33,7 @@ class AsyncSolrClientSpec extends FunSpec with Matchers with FutureAwaits with M
         override def createHttpClient = ahcMock
       }.build
 
-      solr.shutdown
+      solr.shutdown()
 
       verify(ahcMock).closeAsynchronously()
     }
@@ -42,7 +42,7 @@ class AsyncSolrClientSpec extends FunSpec with Matchers with FutureAwaits with M
       val ahcMock = mock[AsyncHttpClient]
       val solr = AsyncSolrClient.Builder("http://localhost:12345/solr").withHttpClient(ahcMock).build
 
-      solr.shutdown
+      solr.shutdown()
 
       verify(ahcMock, times(0)).closeAsynchronously()
     }
diff --git a/src/test/scala/io/ino/solrs/CloudSolrServersIntegrationSpec.scala b/src/test/scala/io/ino/solrs/CloudSolrServersIntegrationSpec.scala
index 6b2f7ff..ecb5ab3 100644
--- a/src/test/scala/io/ino/solrs/CloudSolrServersIntegrationSpec.scala
+++ b/src/test/scala/io/ino/solrs/CloudSolrServersIntegrationSpec.scala
@@ -56,7 +56,7 @@ class CloudSolrServersIntegrationSpec extends FunSpec with BeforeAndAfterAll wit
   override def afterAll(configMap: ConfigMap) {
     cloudSolrServer.shutdown()
     cut.shutdown
-    solrs.values.foreach(_.shutdown)
+    solrs.values.foreach(_.shutdown())
     solrRunners.foreach(_.stop())
     zk.close()
   }