diff --git a/cas-client-core/src/main/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilter.java b/cas-client-core/src/main/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilter.java
index 3642705..61d3742 100644
--- a/cas-client-core/src/main/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilter.java
+++ b/cas-client-core/src/main/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilter.java
@@ -91,7 +91,7 @@ public class Cas20ProxyReceivingTicketValidationFilter extends AbstractTicketVal
         if (CommonUtils.isNotBlank(allowAnyProxy) || CommonUtils.isNotBlank(allowedProxyChains)) {
             final Cas20ProxyTicketValidator v = new Cas20ProxyTicketValidator(casServerUrlPrefix);
             v.setAcceptAnyProxy(parseBoolean(allowAnyProxy));
-            v.setAllowedProxyChains(new ProxyList(constructListOfProxies(allowedProxyChains)));
+            v.setAllowedProxyChains(createProxyList(allowedProxyChains));
             validator = v;
         } else {
             validator = new Cas20ServiceTicketValidator(casServerUrlPrefix);
@@ -117,17 +117,15 @@ public class Cas20ProxyReceivingTicketValidationFilter extends AbstractTicketVal
         return validator;
     }
 
-    protected final List constructListOfProxies(final String proxies) {
+    protected final ProxyList createProxyList(final String proxies) {
         if (CommonUtils.isBlank(proxies)) {
-            return new ArrayList();
+            return new ProxyList();
         }
 
-        final String[] splitProxies = proxies.split("\n");
-        final List items = Arrays.asList(splitProxies);
         final ProxyListEditor editor = new ProxyListEditor();
-        editor.setValue(items);
-        return (List) editor.getValue();
-    }
+        editor.setAsText(proxies);
+        return (ProxyList) editor.getValue();
+     }
 
     public void destroy() {
         super.destroy();
diff --git a/cas-client-core/src/main/java/org/jasig/cas/client/validation/ProxyList.java b/cas-client-core/src/main/java/org/jasig/cas/client/validation/ProxyList.java
index 107b042..0105713 100644
--- a/cas-client-core/src/main/java/org/jasig/cas/client/validation/ProxyList.java
+++ b/cas-client-core/src/main/java/org/jasig/cas/client/validation/ProxyList.java
@@ -5,6 +5,8 @@
  */
 package org.jasig.cas.client.validation;
 
+import org.jasig.cas.client.util.CommonUtils;
+
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Iterator;
@@ -22,6 +24,13 @@ public final class ProxyList {
     private final List proxyChains;
 
     public ProxyList(final List proxyChains) {
+        CommonUtils.assertNotNull(proxyChains, "List of proxy chains cannot be null.");
+
+        // Assert that all entries in the list are String[]
+        for (final Iterator iter = proxyChains.iterator(); iter.hasNext();) {
+            CommonUtils.assertTrue(iter.next() instanceof String[], "Proxy chains must contain String[] items exclusively.");
+        }
+
         this.proxyChains = proxyChains;
     }
 
diff --git a/cas-client-core/src/test/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilterTest.java b/cas-client-core/src/test/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilterTests.java
similarity index 69%
rename from cas-client-core/src/test/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilterTest.java
rename to cas-client-core/src/test/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilterTests.java
index 432bb58..daa2556 100644
--- a/cas-client-core/src/test/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilterTest.java
+++ b/cas-client-core/src/test/java/org/jasig/cas/client/validation/Cas20ProxyReceivingTicketValidationFilterTests.java
@@ -1,21 +1,21 @@
 package org.jasig.cas.client.validation;
 
 import junit.framework.TestCase;
-
-import java.util.Timer;
-import java.util.TimerTask;
-
 import org.jasig.cas.client.proxy.CleanUpTimerTask;
 import org.jasig.cas.client.proxy.ProxyGrantingTicketStorage;
 import org.jasig.cas.client.proxy.ProxyGrantingTicketStorageImpl;
 import org.jasig.cas.client.util.MethodFlag;
+import org.springframework.mock.web.MockFilterConfig;
+
+import java.util.Timer;
+import java.util.TimerTask;
 
 /**
- * Unit test for {@link Cas20ProxyReceivingTicketValidationFilter}
- * 
+ * Unit test for {@link org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter}
+ *
  * @author Brad Cupit (brad [at] lsu {dot} edu)
  */
-public class Cas20ProxyReceivingTicketValidationFilterTest extends TestCase {
+public class Cas20ProxyReceivingTicketValidationFilterTests extends TestCase {
 
     private final Timer defaultTimer = new Timer(true);
 
@@ -59,7 +59,7 @@ public class Cas20ProxyReceivingTicketValidationFilterTest extends TestCase {
         filter.setTimerTask(defaultTimerTask);
         filter.init();
         filter.destroy();
-        
+
         assertTrue(cancelMethodFlag.wasCalled());
     }
 
@@ -115,11 +115,11 @@ public void testCallsCleanAllOnSchedule() throws Exception {
 
         filter.destroy();
     }
-    
+
     public void testThrowsForNullStorage() throws Exception {
         Cas20ProxyReceivingTicketValidationFilter filter = newCas20ProxyReceivingTicketValidationFilter();
         filter.setProxyGrantingTicketStorage(null);
-        
+
         try {
             filter.init();
             fail("expected an exception due to null ProxyGrantingTicketStorage");
@@ -127,15 +127,50 @@ public void testCallsCleanAllOnSchedule() throws Exception {
             // test passes
         }
     }
-    
+
+    public void testGetTicketValidator() throws Exception {
+        Cas20ProxyReceivingTicketValidationFilter filter = newCas20ProxyReceivingTicketValidationFilter();
+        filter.setProxyGrantingTicketStorage(storage);
+        filter.setMillisBetweenCleanUps(250);
+        filter.setTimer(defaultTimer);
+        filter.setTimerTask(new TimerTask() {
+          public void run() {}
+        });
+        filter.init();
+
+        // Test case #1
+        final MockFilterConfig config1 = new MockFilterConfig();
+        config1.addInitParameter("allowedProxyChains", "https://a.example.com");
+        config1.addInitParameter("casServerUrlPrefix", "https://cas.jasig.org/");
+        assertNotNull(filter.getTicketValidator(config1));
+
+        // Test case #2
+        final MockFilterConfig config2 = new MockFilterConfig();
+        config2.addInitParameter(
+                "allowedProxyChains",
+                "https://a.example.com https://b.example.com");
+        config2.addInitParameter("casServerUrlPrefix", "https://cas.jasig.org/");
+        assertNotNull(filter.getTicketValidator(config2));
+
+        // Test case #3
+        final MockFilterConfig config3 = new MockFilterConfig();
+        config3.addInitParameter(
+                "allowedProxyChains",
+                "https://a.example.com https://b.example.com\nhttps://c.example.com");
+        config3.addInitParameter("casServerUrlPrefix", "https://cas.jasig.org/");
+        assertNotNull(filter.getTicketValidator(config3));
+    }
+  
+
+
     /**
-     * construct a working {@link Cas20ProxyReceivingTicketValidationFilter}
+     * construct a working {@link org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter}
      */
     private Cas20ProxyReceivingTicketValidationFilter newCas20ProxyReceivingTicketValidationFilter() {
         final Cas20ProxyReceivingTicketValidationFilter filter = new Cas20ProxyReceivingTicketValidationFilter();
         filter.setServerName("localhost");
         filter.setTicketValidator(new Cas20ProxyTicketValidator(""));
-        
+
         return filter;
     }
-}
+}
\ No newline at end of file