diff --git a/CMakeLists.txt b/CMakeLists.txt
index 929771fa7..4359f12ed 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -78,6 +78,7 @@ file(GLOB_RECURSE TOOL_SOURCES CONFIGURE_DEPENDS
 )
 
 file(GLOB_RECURSE TEST_SOURCES CONFIGURE_DEPENDS
+    source/tests/*.hpp
     source/tests/*.cpp
 )
 
diff --git a/include/mrdox/Config.hpp b/include/mrdox/Config.hpp
index 5a2387422..0f8fe964e 100644
--- a/include/mrdox/Config.hpp
+++ b/include/mrdox/Config.hpp
@@ -45,7 +45,7 @@ struct Config
     std::string ProjectName;
 
     // Indicates if only public declarations are documented.
-    bool PublicOnly;
+    bool PublicOnly = true;
 
     // Directory for outputting generated files.
     std::string OutDirectory;
diff --git a/source/lib/XML.cpp b/source/lib/XML.cpp
index 5896582d9..b85d98929 100644
--- a/source/lib/XML.cpp
+++ b/source/lib/XML.cpp
@@ -13,10 +13,12 @@
 #include "CorpusVisitor.hpp"
 #include "Representation.h"
 #include <mrdox/Config.hpp>
+#include <clang/Tooling/Execution.h>
 #include <clang/Tooling/Tooling.h>
 #include <llvm/ADT/StringRef.h>
 #include <llvm/Support/FileSystem.h>
 #include <llvm/Support/Path.h>
+#include <llvm/Support/YAMLParser.h>
 
 //------------------------------------------------
 /*
@@ -553,6 +555,33 @@ char const*
 XMLGenerator::
 Format = "xml";
 
+/** A visitor which keeps its own map of tool results.
+*/
+class TestVisitor
+    : public BasicVisitor
+{
+    TestVisitor& corpus_;
+    tooling::InMemoryToolResults results_;
+
+public:
+    TestVisitor(
+        TestVisitor& corpus,
+        Config const& cfg) noexcept
+        : BasicVisitor(cfg)
+        , corpus_(corpus)
+    {
+    }
+
+private:
+    void
+    reportResult(
+        StringRef Key,
+        StringRef Value) override
+    {
+        results_.addResult(Key, Value);
+    }
+};
+
 } // (anon)
 
 //------------------------------------------------
diff --git a/source/tests/TestVisitor.cpp b/source/tests/TestAction.cpp
similarity index 100%
rename from source/tests/TestVisitor.cpp
rename to source/tests/TestAction.cpp
diff --git a/source/tests/TestAction.hpp b/source/tests/TestAction.hpp
new file mode 100644
index 000000000..d042f6ca9
--- /dev/null
+++ b/source/tests/TestAction.hpp
@@ -0,0 +1,94 @@
+//
+// Licensed under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// Copyright (c) 2023 Vinnie Falco (vinnie.falco@gmail.com)
+//
+// Official repository: https://github.com/cppalliance/mrdox
+//
+
+#ifndef MRDOX_TEST_TEST_VISITOR_HPP
+#define MRDOX_TEST_TEST_VISITOR_HPP
+
+#include <mrdox/BasicVisitor.hpp>
+#include <clang/Tooling/Execution.h>
+
+namespace clang {
+namespace mrdox {
+
+//------------------------------------------------
+
+/** A Visitor which stores tool results in a local map
+*/
+struct TestVisitor : public BasicVisitor
+{
+    explicit
+    TestVisitor(
+        Config const& cfg) noexcept
+        : BasicVisitor(cfg)
+    {
+    }
+
+private:
+    void
+    reportResult(
+        llvm::StringRef Key,
+        llvm::StringRef Value) override
+    {
+        results_.addResult(Key, Value);
+    }
+
+    tooling::InMemoryToolResults results_;
+};
+
+//------------------------------------------------
+
+struct TestAction
+    : public clang::ASTFrontendAction
+{
+    explicit
+    TestAction(
+        Config const& cfg) noexcept
+        : cfg_(cfg)
+    {
+    }
+
+    std::unique_ptr<clang::ASTConsumer>
+    CreateASTConsumer(
+        clang::CompilerInstance& Compiler,
+        llvm::StringRef InFile) override
+    {
+        return std::make_unique<TestVisitor>(cfg_);
+    }
+
+private:
+    Config const& cfg_;
+};
+
+//------------------------------------------------
+
+struct TestFactory
+    : public tooling::FrontendActionFactory
+{
+    explicit
+    TestFactory(
+        Config const& cfg) noexcept
+        : cfg_(cfg)
+    {
+    }
+
+    std::unique_ptr<FrontendAction>
+    create() override
+    {
+        return std::make_unique<TestAction>(cfg_);
+    }
+
+private:
+    Config const& cfg_;
+};
+
+} // mrdox
+} // clang
+
+#endif
diff --git a/source/tests/TestMain.cpp b/source/tests/TestMain.cpp
index c09a7fa39..a6ae394fb 100644
--- a/source/tests/TestMain.cpp
+++ b/source/tests/TestMain.cpp
@@ -10,6 +10,7 @@
 
 #include "ClangDoc.h"
 #include "Representation.h"
+#include "TestAction.hpp"
 #include <mrdox/Config.hpp>
 #include <mrdox/XML.hpp>
 #include <clang/tooling/CompilationDatabase.h>
@@ -78,6 +79,8 @@ struct Reporter
     }
 };
 
+//------------------------------------------------
+
 /** Return command line arguments as a vector of strings.
 */
 std::vector<std::string>
@@ -112,7 +115,8 @@ createExecutor(
 #endif
     auto executor = std::make_unique<
         tooling::StandaloneToolExecutor>(
-            compilations, llvm::ArrayRef<std::string>{} );
+            compilations,
+            compilations.getAllFiles());
     if (!executor)
         return llvm::make_error<llvm::StringError>(
             "could not create StandaloneToolExecutor",
@@ -258,12 +262,11 @@ testMain(int argc, const char** argv)
         Args.push_back(argv[i]);
 
     Config cfg;
-    if(llvm::Error err = setupConfig(cfg, argc, argv))
-    {
-        llvm::errs() << "test failure: " << err << "\n";
-        return EXIT_FAILURE;
-    }
 
+    llvm::Error err = executor->execute(std::make_unique<TestFactory>(cfg));
+    R.success("execute", err);
+
+#if 0
     std::string xml;
     for(int i = 1; i < argc; ++i)
     {
@@ -359,6 +362,7 @@ testMain(int argc, const char** argv)
             iter.increment(ec);
         }
     }
+#endif
 
     if(R.failed)
         return EXIT_FAILURE;
diff --git a/source/tests/TestVisitor.hpp b/source/tests/TestVisitor.hpp
deleted file mode 100644
index 954e8bb33..000000000
--- a/source/tests/TestVisitor.hpp
+++ /dev/null
@@ -1,25 +0,0 @@
-//
-// Licensed under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// Copyright (c) 2023 Vinnie Falco (vinnie.falco@gmail.com)
-//
-// Official repository: https://github.com/cppalliance/mrdox
-//
-
-#ifndef MRDOX_TEST_TEST_VISITOR_HPP
-#define MRDOX_TEST_TEST_VISITOR_HPP
-
-#include <mrdox/BasicVisitor.hpp>
-
-namespace clang {
-namespace mrdox
-
-class TestVisitor
-    : public BasicVisitor
-
-} // mrdox
-} // clang
-
-#endif