diff --git a/core/src/main/java/org/apache/struts2/factory/PrefixBasedActionProxyFactory.java b/core/src/main/java/org/apache/struts2/factory/PrefixBasedActionProxyFactory.java
index 03052ec6a..cf196a9b2 100644
--- a/core/src/main/java/org/apache/struts2/factory/PrefixBasedActionProxyFactory.java
+++ b/core/src/main/java/org/apache/struts2/factory/PrefixBasedActionProxyFactory.java
@@ -59,12 +59,11 @@ import java.util.Set;
  * </pre>
  * <!-- END SNIPPET: description -->
  */
-public class PrefixBasedActionProxyFactory extends StrutsActionProxyFactory implements Initializable {
+public class PrefixBasedActionProxyFactory extends StrutsActionProxyFactory {
 
     private static final Logger LOG = LogManager.getLogger(PrefixBasedActionProxyFactory.class);
 
     private Map<String, ActionProxyFactory> actionProxyFactories = new HashMap<>();
-    private Set<String> prefixes = new HashSet<>();
 
     @Inject
     public void setContainer(Container container) {
@@ -74,22 +73,18 @@ public class PrefixBasedActionProxyFactory extends StrutsActionProxyFactory impl
     @Inject(StrutsConstants.PREFIX_BASED_MAPPER_CONFIGURATION)
     public void setPrefixBasedActionProxyFactories(String list) {
         if (list != null) {
-            prefixes = new HashSet<>(Arrays.asList(list.split(",")));
-        }
-    }
-
-    @Override
-    public void init() {
-        for (String factory : prefixes) {
-            String[] thisFactory = factory.split(":");
-            if (thisFactory.length == 2) {
-                String factoryPrefix = thisFactory[0].trim();
-                String factoryName = thisFactory[1].trim();
-                ActionProxyFactory obj = container.getInstance(ActionProxyFactory.class, factoryName);
-                if (obj != null) {
-                    actionProxyFactories.put(factoryPrefix, obj);
-                } else {
-                    LOG.warn("Invalid PrefixBasedActionProxyFactory config entry: [{}]", factory);
+            Set<String> prefixes = new HashSet<>(Arrays.asList(list.split(",")));
+            for (String factory : prefixes) {
+                String[] thisFactory = factory.split(":");
+                if (thisFactory.length == 2) {
+                    String factoryPrefix = thisFactory[0].trim();
+                    String factoryName = thisFactory[1].trim();
+                    ActionProxyFactory obj = container.getInstance(ActionProxyFactory.class, factoryName);
+                    if (obj != null) {
+                        actionProxyFactories.put(factoryPrefix, obj);
+                    } else {
+                        LOG.warn("Invalid PrefixBasedActionProxyFactory config entry: [{}]", factory);
+                    }
                 }
             }
         }
diff --git a/core/src/test/java/org/apache/struts2/factory/PrefixBasedActionProxyFactoryTest.java b/core/src/test/java/org/apache/struts2/factory/PrefixBasedActionProxyFactoryTest.java
index 827b86b7d..f19c184ab 100644
--- a/core/src/test/java/org/apache/struts2/factory/PrefixBasedActionProxyFactoryTest.java
+++ b/core/src/test/java/org/apache/struts2/factory/PrefixBasedActionProxyFactoryTest.java
@@ -23,7 +23,7 @@ public class PrefixBasedActionProxyFactoryTest extends StrutsInternalTestCase {
     private PrefixBasedActionProxyFactory factory;
 
     public void testDifferentPrefixes() throws Exception {
-        initFactory("/ns1:prefix1,/ns2:prefix2");
+        factory.setPrefixBasedActionProxyFactories("/ns1:prefix1,/ns2:prefix2");
 
         ActionProxy proxy1 = factory.createActionProxy("/ns1", "", "", Collections.<String, Object>emptyMap(), false, true);
         assertTrue(proxy1 instanceof Prefix1ActionProxy);
@@ -33,7 +33,7 @@ public class PrefixBasedActionProxyFactoryTest extends StrutsInternalTestCase {
     }
 
     public void testFallbackToDefault() throws Exception {
-        initFactory("/ns1:prefix1");
+        factory.setPrefixBasedActionProxyFactories("/ns1:prefix1");
 
         ActionProxy proxy1 = factory.createActionProxy("/ns1", "", "", Collections.<String, Object>emptyMap(), false, true);
         assertTrue(proxy1 instanceof Prefix1ActionProxy);
@@ -43,7 +43,7 @@ public class PrefixBasedActionProxyFactoryTest extends StrutsInternalTestCase {
     }
 
     public void testEmptyPrefix() throws Exception {
-        initFactory(":prefix1");
+        factory.setPrefixBasedActionProxyFactories(":prefix1");
 
         ActionProxy proxy1 = factory.createActionProxy("/ns1", "", "", Collections.<String, Object>emptyMap(), false, true);
         assertTrue(proxy1 instanceof Prefix1ActionProxy);
@@ -86,9 +86,10 @@ public class PrefixBasedActionProxyFactoryTest extends StrutsInternalTestCase {
         factory.setContainer(container);
     }
 
-    void initFactory(String prefixes) {
-        factory.setPrefixBasedActionProxyFactories(prefixes);
-        factory.init();
+    @Override
+    public void tearDown() throws Exception {
+        super.tearDown();
+        factory = null;
     }
 
     public static class Prefix1Factory extends DefaultActionProxyFactory {