diff --git a/all-signatures.txt b/all-signatures.txt
new file mode 100644
index 00000000000..5f13cea4af7
--- /dev/null
+++ b/all-signatures.txt
@@ -0,0 +1,3 @@
+@defaultMessage Convert to URI
+java.net.URL#getPath()
+java.net.URL#getFile()
diff --git a/pom.xml b/pom.xml
index 79ed3ecadd1..1cd363417a3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1077,6 +1077,7 @@
                             </bundledSignatures>
                             <signaturesFiles>
                                 <signaturesFile>core-signatures.txt</signaturesFile>
+                                <signaturesFile>all-signatures.txt</signaturesFile>
                             </signaturesFiles>
                             <signatures>${forbidden.signatures}</signatures>
                         </configuration>
@@ -1098,6 +1099,10 @@
                                 <bundledSignature>jdk-unsafe</bundledSignature>
                                 <bundledSignature>jdk-deprecated</bundledSignature>
                             </bundledSignatures>
+                            <signaturesFiles>
+                                <signaturesFile>test-signatures.txt</signaturesFile>
+                                <signaturesFile>all-signatures.txt</signaturesFile>
+                            </signaturesFiles>
                             <signatures>${forbidden.test.signatures}</signatures>
                         </configuration>
                         <phase>test-compile</phase>
diff --git a/src/test/java/org/elasticsearch/plugin/PluginManagerTests.java b/src/test/java/org/elasticsearch/plugin/PluginManagerTests.java
index f9a9e9e9bde..1d038f9c1b5 100644
--- a/src/test/java/org/elasticsearch/plugin/PluginManagerTests.java
+++ b/src/test/java/org/elasticsearch/plugin/PluginManagerTests.java
@@ -43,7 +43,7 @@ import org.junit.Test;
 
 import java.io.File;
 import java.io.IOException;
-import java.net.URL;
+import java.net.URI;
 import java.util.concurrent.TimeUnit;
 
 import static org.elasticsearch.test.ElasticsearchIntegrationTest.*;
@@ -73,8 +73,8 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
     public void testLocalPluginInstallSingleFolder() throws Exception {
         //When we have only a folder in top-level (no files either) we remove that folder while extracting
         String pluginName = "plugin-test";
-        URL url = PluginManagerTests.class.getResource("plugin_single_folder.zip");
-        downloadAndExtract(pluginName, "file://" + url.getFile());
+        URI uri = URI.create(PluginManagerTests.class.getResource("plugin_single_folder.zip").toString());
+        downloadAndExtract(pluginName, "file://" + uri.getPath());
 
         cluster().startNode(SETTINGS);
 
@@ -87,8 +87,8 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
         //When we have only a folder in top-level (no files either) but it's called _site, we make it work
         //we can either remove the folder while extracting and then re-add it manually or just leave it as it is
         String pluginName = "plugin-test";
-        URL url = PluginManagerTests.class.getResource("plugin_folder_site.zip");
-        downloadAndExtract(pluginName, "file://" + url.getFile());
+        URI uri = URI.create(PluginManagerTests.class.getResource("plugin_folder_site.zip").toString());
+        downloadAndExtract(pluginName, "file://" + uri.getPath());
 
         String nodeName = cluster().startNode(SETTINGS);
 
@@ -100,8 +100,8 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
     public void testLocalPluginWithoutFolders() throws Exception {
         //When we don't have folders at all in the top-level, but only files, we don't modify anything
         String pluginName = "plugin-test";
-        URL url = PluginManagerTests.class.getResource("plugin_without_folders.zip");
-        downloadAndExtract(pluginName, "file://" + url.getFile());
+        URI uri = URI.create(PluginManagerTests.class.getResource("plugin_without_folders.zip").toString());
+        downloadAndExtract(pluginName, "file://" + uri.getPath());
 
         cluster().startNode(SETTINGS);
 
@@ -113,8 +113,8 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
     public void testLocalPluginFolderAndFile() throws Exception {
         //When we have a single top-level folder but also files in the top-level, we don't modify anything
         String pluginName = "plugin-test";
-        URL url = PluginManagerTests.class.getResource("plugin_folder_file.zip");
-        downloadAndExtract(pluginName, "file://" + url.getFile());
+        URI uri = URI.create(PluginManagerTests.class.getResource("plugin_folder_file.zip").toString());
+        downloadAndExtract(pluginName, "file://" + uri.getPath());
 
         cluster().startNode(SETTINGS);
 
@@ -125,8 +125,8 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
     @Test(expected = IllegalArgumentException.class)
     public void testSitePluginWithSourceThrows() throws Exception {
         String pluginName = "plugin-with-source";
-        URL url = PluginManagerTests.class.getResource("plugin_with_sourcefiles.zip");
-        downloadAndExtract(pluginName, "file://" + url.getFile());
+        URI uri = URI.create(PluginManagerTests.class.getResource("plugin_with_sourcefiles.zip").toString());
+        downloadAndExtract(pluginName, "file://" + uri.getPath());
     }
 
     /**
@@ -197,7 +197,8 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
 
     @Test
     public void testInstallPlugin() throws IOException {
-        PluginManager pluginManager = pluginManager("file://".concat(PluginManagerTests.class.getResource("plugin_with_classfile.zip").getFile()));
+        PluginManager pluginManager = pluginManager("file://".concat(
+                URI.create(PluginManagerTests.class.getResource("plugin_with_classfile.zip").toString()).getPath()));
 
         pluginManager.downloadAndExtract("plugin");
         File[] plugins = pluginManager.getListInstalledPlugins();
@@ -207,7 +208,8 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
 
     @Test
     public void testInstallSitePlugin() throws IOException {
-        PluginManager pluginManager = pluginManager("file://".concat(PluginManagerTests.class.getResource("plugin_without_folders.zip").getFile()));
+        PluginManager pluginManager = pluginManager("file://".concat(
+                URI.create(PluginManagerTests.class.getResource("plugin_without_folders.zip").toString()).getPath()));
 
         pluginManager.downloadAndExtract("plugin-site");
         File[] plugins = pluginManager.getListInstalledPlugins();
@@ -301,13 +303,16 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
     @Test
     public void testRemovePlugin() throws Exception {
         // We want to remove plugin with plugin short name
-        singlePluginInstallAndRemove("plugintest", "file://".concat(PluginManagerTests.class.getResource("plugin_without_folders.zip").getFile()));
+        singlePluginInstallAndRemove("plugintest", "file://".concat(
+                URI.create(PluginManagerTests.class.getResource("plugin_without_folders.zip").toString()).getPath()));
 
         // We want to remove plugin with groupid/artifactid/version form
-        singlePluginInstallAndRemove("groupid/plugintest/1.0.0", "file://".concat(PluginManagerTests.class.getResource("plugin_without_folders.zip").getFile()));
+        singlePluginInstallAndRemove("groupid/plugintest/1.0.0", "file://".concat(
+                URI.create(PluginManagerTests.class.getResource("plugin_without_folders.zip").toString()).getPath()));
 
         // We want to remove plugin with groupid/artifactid form
-        singlePluginInstallAndRemove("groupid/plugintest", "file://".concat(PluginManagerTests.class.getResource("plugin_without_folders.zip").getFile()));
+        singlePluginInstallAndRemove("groupid/plugintest", "file://".concat(
+                URI.create(PluginManagerTests.class.getResource("plugin_without_folders.zip").toString()).getPath()));
     }
 
     @Test(expected = ElasticsearchIllegalArgumentException.class)
diff --git a/test-signatures.txt b/test-signatures.txt
new file mode 100644
index 00000000000..e69de29bb2d