diff --git a/jvm-packages/pom.xml b/jvm-packages/pom.xml
index cecf1fa59..d62d192af 100644
--- a/jvm-packages/pom.xml
+++ b/jvm-packages/pom.xml
@@ -17,9 +17,9 @@
     </properties>
     <repositories>
         <repository>
-            <id>apache_maven</id>
-            <name>apache maven</name>
-            <url>http://repo.maven.apache.org/maven2</url>
+            <id>central_maven</id>
+            <name>central maven</name>
+            <url>https://repo1.maven.org/maven2</url>
         </repository>
     </repositories>
     <modules>
@@ -172,6 +172,9 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>2.19.1</version>
+                <configuration>
+                    <skipTests>true</skipTests>
+                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.scalatest</groupId>
diff --git a/python-package/xgboost/rabit.py b/python-package/xgboost/rabit.py
index 89b2a4ec6..f12a08f51 100644
--- a/python-package/xgboost/rabit.py
+++ b/python-package/xgboost/rabit.py
@@ -131,6 +131,7 @@ def broadcast(data, root):
         del s
     return data
 
+
 # enumeration of dtypes
 DTYPE_ENUM__ = {
     np.dtype('int8'): 0,
@@ -204,5 +205,6 @@ def version_number():
     ret = _LIB.RabitVersionNumber()
     return ret
 
+
 # intialization script
 _init_rabit()