diff --git a/buildsystem/buildsystem.h b/buildsystem/buildsystem.h
--- a/buildsystem/buildsystem.h
+++ b/buildsystem/buildsystem.h
@@ -37,6 +37,7 @@
     bool removeTarget(KDevelop::ProjectTargetItem *target) override;
     bool removeFilesFromTargets(const QList<KDevelop::ProjectFileItem*>&) override;
     bool hasBuildInfo(KDevelop::ProjectBaseItem* item) const override;
+    KDevelop::Path compiler(KDevelop::ProjectTargetItem* p) const override;
     KDevelop::Path buildDirectory(KDevelop::ProjectBaseItem*) const override;
     QList<KDevelop::ProjectTargetItem*> targets(KDevelop::ProjectFolderItem*) const override;
     KDevelop::ProjectFolderItem* createFolderItem(KDevelop::IProject * project, const KDevelop::Path & path, KDevelop::ProjectBaseItem * parent) override;
diff --git a/buildsystem/buildsystem.cpp b/buildsystem/buildsystem.cpp
--- a/buildsystem/buildsystem.cpp
+++ b/buildsystem/buildsystem.cpp
@@ -95,6 +95,12 @@
     return false;
 }
 
+Path GoBuildSystem::compiler(KDevelop::ProjectTargetItem* p) const
+{
+    Q_UNUSED(p);
+    return Path("go");
+}
+
 Path GoBuildSystem::buildDirectory(KDevelop::ProjectBaseItem* item) const
 {
     auto project = item->project();
diff --git a/codecompletion/CMakeLists.txt b/codecompletion/CMakeLists.txt
--- a/codecompletion/CMakeLists.txt
+++ b/codecompletion/CMakeLists.txt
@@ -21,4 +21,6 @@
 
 install(TARGETS kdevgocompletion DESTINATION ${INSTALL_TARGETS_DEFAULT_ARGS})
 
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
diff --git a/duchain/CMakeLists.txt b/duchain/CMakeLists.txt
--- a/duchain/CMakeLists.txt
+++ b/duchain/CMakeLists.txt
@@ -33,4 +33,6 @@
 
 install(TARGETS kdevgoduchain DESTINATION ${INSTALL_TARGETS_DEFAULT_ARGS})
 
-add_subdirectory(tests)
\ No newline at end of file
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
diff --git a/duchain/goducontext.h b/duchain/goducontext.h
--- a/duchain/goducontext.h
+++ b/duchain/goducontext.h
@@ -46,8 +46,9 @@
         static_cast<KDevelop::DUChainBase*>(this)->d_func_dynamic()->setClassId(this);
     }
 
-    QWidget* createNavigationWidget(KDevelop::Declaration* decl, KDevelop::TopDUContext* topContext,
-                                            const QString& htmlPrefix, const QString& htmlSuffix, const KDevelop::AbstractNavigationWidget::DisplayHints hints) const override;
+    KDevelop::AbstractNavigationWidget*
+    createNavigationWidget(KDevelop::Declaration* decl, KDevelop::TopDUContext* topContext,
+                           KDevelop::AbstractNavigationWidget::DisplayHints hints) const override;
 
     enum {
         Identity = BaseContext::Identity + 51
diff --git a/duchain/goducontext.cpp b/duchain/goducontext.cpp
--- a/duchain/goducontext.cpp
+++ b/duchain/goducontext.cpp
@@ -37,26 +37,26 @@
 typedef GoDUContext<DUContext> GoNormalDUContext;
 REGISTER_DUCHAIN_ITEM_WITH_DATA(GoNormalDUContext, DUContextData);
 
-template<>
-QWidget* GoTopDUContext::createNavigationWidget(Declaration* decl, TopDUContext* topContext,
-                                                const QString& htmlPrefix, const QString& htmlSuffix,
-                                                const KDevelop::AbstractNavigationWidget::DisplayHints hints) const {
+template <>
+AbstractNavigationWidget*
+GoTopDUContext::createNavigationWidget(Declaration* decl, TopDUContext* topContext,
+                                             AbstractNavigationWidget::DisplayHints hints) const {
     if (!decl) {
         qCDebug(DUCHAIN) << "no declaration, not returning navigationwidget";
         return 0;
     }
-    return new NavigationWidget(decl, topContext, htmlPrefix, htmlSuffix, hints);
+    return new NavigationWidget(decl, topContext, hints);
 }
 
-template<>
-QWidget* GoNormalDUContext::createNavigationWidget(Declaration* decl, TopDUContext* topContext,
-                                                   const QString& htmlPrefix, const QString& htmlSuffix,
-                                                   const KDevelop::AbstractNavigationWidget::DisplayHints hints) const {
+template <>
+AbstractNavigationWidget*
+GoNormalDUContext::createNavigationWidget(Declaration* decl, TopDUContext* topContext,
+                                             AbstractNavigationWidget::DisplayHints hints) const {
     if (!decl) {
         qCDebug(DUCHAIN) << "no declaration, not returning navigationwidget";
         return 0;
     }
-    return new NavigationWidget(decl, topContext, htmlPrefix, htmlSuffix, hints);
+    return new NavigationWidget(decl, topContext, hints);
 }
 
 }
diff --git a/duchain/navigation/declarationnavigationcontext.cpp b/duchain/navigation/declarationnavigationcontext.cpp
--- a/duchain/navigation/declarationnavigationcontext.cpp
+++ b/duchain/navigation/declarationnavigationcontext.cpp
@@ -71,9 +71,7 @@
 {
   clear();
   AbstractNavigationContext::html(shorten);
-  modifyHtml()  += "<html><body><p>" + fontSizePrefix(shorten);
-
-  addExternalHtml(prefix());
+  modifyHtml()  += "<html><body><p>" + shorten;
 
   if(!declaration().data()) {
     modifyHtml() += i18n("<br /> lost declaration <br />");
@@ -291,9 +289,8 @@
   
     //modifyHtml() += "<br />";
 
-  addExternalHtml(suffix());
 
-  modifyHtml() += fontSizeSuffix(shorten) + "</p></body></html>";
+  modifyHtml() += shorten + "</p></body></html>";
 
   return currentHtml();
 }
diff --git a/duchain/navigation/navigationwidget.h b/duchain/navigation/navigationwidget.h
--- a/duchain/navigation/navigationwidget.h
+++ b/duchain/navigation/navigationwidget.h
@@ -27,7 +27,7 @@
 {
 public:
     NavigationWidget(KDevelop::Declaration* decl, KDevelop::TopDUContext* topContext,
-                     const QString& htmlPrefix, const QString& htmlSuffix, const KDevelop::AbstractNavigationWidget::DisplayHints hints);
+                     const KDevelop::AbstractNavigationWidget::DisplayHints hints);
   
 };
 
diff --git a/duchain/navigation/navigationwidget.cpp b/duchain/navigation/navigationwidget.cpp
--- a/duchain/navigation/navigationwidget.cpp
+++ b/duchain/navigation/navigationwidget.cpp
@@ -24,12 +24,10 @@
 using namespace KDevelop;
 
 NavigationWidget::NavigationWidget(KDevelop::Declaration* decl, KDevelop::TopDUContext* topContext,
-                                   const QString& htmlPrefix, const QString& htmlSuffix,
                                    const KDevelop::AbstractNavigationWidget::DisplayHints hints)
 {
     auto context = NavigationContextPointer(new DeclarationNavigationContext(DeclarationPointer(decl), TopDUContextPointer(topContext), nullptr));
     
-    context->setPrefixSuffix(htmlPrefix, htmlSuffix);
     setDisplayHints(hints);
     setContext(context);
 }
diff --git a/parser/CMakeLists.txt b/parser/CMakeLists.txt
--- a/parser/CMakeLists.txt
+++ b/parser/CMakeLists.txt
@@ -20,4 +20,6 @@
 )
 install(TARGETS kdevgoparser DESTINATION ${INSTALL_TARGETS_DEFAULT_ARGS})
 
-add_subdirectory(test)
+if(BUILD_TESTING)
+    add_subdirectory(test)
+endif()