Index: test/unit/org/openstreetmap/josm/testutils/mockers/OpenBrowserMocker.java
===================================================================
--- test/unit/org/openstreetmap/josm/testutils/mockers/OpenBrowserMocker.java	(nonexistent)
+++ test/unit/org/openstreetmap/josm/testutils/mockers/OpenBrowserMocker.java	(working copy)
@@ -0,0 +1,50 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.testutils.mockers;
+
+import static org.openstreetmap.josm.tools.I18n.tr;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.openstreetmap.josm.tools.CheckParameterUtil;
+import org.openstreetmap.josm.tools.Logging;
+import org.openstreetmap.josm.tools.OpenBrowser;
+
+import mockit.Mock;
+import mockit.MockUp;
+
+/**
+ * MockUp for {@link OpenBrowser}.
+ *
+ * @author Taylor Smock
+ * @since xxx
+ */
+public class OpenBrowserMocker extends MockUp<OpenBrowser> {
+    private static List<URI> calledUris = new ArrayList<>();
+    /**
+     * A Mock for {@link OpenBrowser#displayUrl} that doesn't actually open a
+     * browser window, for use in headless environments.
+     *
+     * @param uri The URI to display (theoretically)
+     * @return <code>null</code> for success.
+     */
+    @Mock
+    public static String displayUrl(URI uri) {
+        CheckParameterUtil.ensureParameterNotNull(uri, "uri");
+
+        Logging.info(tr("Opening URL: {0}", uri));
+        calledUris.add(uri);
+
+        return null;
+    }
+
+    /**
+     * Get the called URIs
+     *
+     * @return A list of called URIs
+     */
+    public static List<URI> getCalledURIs() {
+        return calledUris;
+    }
+}