diff --git a/test/src/test/java/hudson/model/MyViewTest.java b/test/src/test/java/hudson/model/MyViewTest.java
index d2cc2a7be0688a64916058bf85f892ddbf1db699..3efa4e9ed04843866f5cc6590fed747ba7c201e2 100644
--- a/test/src/test/java/hudson/model/MyViewTest.java
+++ b/test/src/test/java/hudson/model/MyViewTest.java
@@ -23,6 +23,7 @@
  */
 package hudson.model;
 
+import org.junit.Before;
 import org.junit.Test;
 import org.jvnet.hudson.test.JenkinsRule.WebClient;
 import com.gargoylesoftware.htmlunit.html.HtmlForm;
@@ -42,6 +43,11 @@ public class MyViewTest {
     
     @Rule
     public JenkinsRule rule = new JenkinsRule();
+
+    @Before
+    public void setup() {
+        rule.jenkins.setSecurityRealm(rule.createDummySecurityRealm());
+    }
     
     @Test
     public void testContains() throws IOException, Exception{
diff --git a/test/src/test/java/hudson/model/NodeTest.java b/test/src/test/java/hudson/model/NodeTest.java
index 8d61e74ac05066794c31fae2a3291e310d4853e4..c24d45913ddab27290d621a479e8410d3fb56311 100644
--- a/test/src/test/java/hudson/model/NodeTest.java
+++ b/test/src/test/java/hudson/model/NodeTest.java
@@ -72,7 +72,8 @@ public class NodeTest {
     @Before
     public void before(){
        addDynamicLabel = false;
-       notTake = false; 
+       notTake = false;
+        j.jenkins.setSecurityRealm(j.createDummySecurityRealm());
     }
     
     @Test
@@ -209,6 +210,7 @@ public class NodeTest {
         HudsonPrivateSecurityRealm realm = new HudsonPrivateSecurityRealm(false);
         j.jenkins.setSecurityRealm(realm);
         User user = User.get("John Smith");
+
         SecurityContextHolder.getContext().setAuthentication(user.impersonate());
         assertFalse("Current user should not have permission read.", node.hasPermission(Permission.READ));
         auth.add(Computer.CONFIGURE, user.getId());