diff --git a/Tests/CMakeLib/CMakeLists.txt b/Tests/CMakeLib/CMakeLists.txt
index 4d43e0828a..008a7d94fc 100644
--- a/Tests/CMakeLib/CMakeLists.txt
+++ b/Tests/CMakeLib/CMakeLists.txt
@@ -1,3 +1,6 @@
+# Render the header file with source path macro
+configure_file(testConfig.h.in testConfig.h @ONLY)
+
 include_directories(
   ${CMAKE_CURRENT_BINARY_DIR}
   ${CMake_BINARY_DIR}/Source
@@ -65,10 +68,8 @@ if(WIN32)
   list(APPEND CMakeLib_TESTS
     testVisualStudioSlnParser.cxx
     )
-  configure_file(testVisualStudioSlnParser.h.in testVisualStudioSlnParser.h @ONLY)
 endif()
 
-configure_file(testXMLParser.h.in testXMLParser.h @ONLY)
 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/testUVProcessChainInput.txt" "HELLO WORLD!")
 
 create_test_sourcelist(CMakeLib_TEST_SRCS CMakeLibTests.cxx ${CMakeLib_TESTS})
diff --git a/Tests/CMakeLib/testConfig.h.in b/Tests/CMakeLib/testConfig.h.in
new file mode 100644
index 0000000000..f57f97e848
--- /dev/null
+++ b/Tests/CMakeLib/testConfig.h.in
@@ -0,0 +1,7 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+
+#pragma once
+
+#define SOURCE_DIR "@CMAKE_CURRENT_SOURCE_DIR@"
+#define BUILD_DIR "@CMAKE_CURRENT_BINARY_DIR@"
diff --git a/Tests/CMakeLib/testVisualStudioSlnParser.cxx b/Tests/CMakeLib/testVisualStudioSlnParser.cxx
index 3485bac4d5..3bab2ba58b 100644
--- a/Tests/CMakeLib/testVisualStudioSlnParser.cxx
+++ b/Tests/CMakeLib/testVisualStudioSlnParser.cxx
@@ -1,10 +1,12 @@
-#include "testVisualStudioSlnParser.h"
-
 #include <iostream>
 
 #include "cmVisualStudioSlnData.h"
 #include "cmVisualStudioSlnParser.h"
 
+#include "testConfig.h"
+
+#define SLN_EXTENSION "sln-file"
+
 static bool parsedRight(cmVisualStudioSlnParser& parser,
                         const std::string& file, cmSlnData& data,
                         cmVisualStudioSlnParser::ParseResult expected =
diff --git a/Tests/CMakeLib/testVisualStudioSlnParser.h.in b/Tests/CMakeLib/testVisualStudioSlnParser.h.in
deleted file mode 100644
index 62c3f4dcc6..0000000000
--- a/Tests/CMakeLib/testVisualStudioSlnParser.h.in
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef testVisualStudioSlnParser_h
-#define testVisualStudioSlnParser_h
-
-#define SOURCE_DIR "@CMAKE_CURRENT_SOURCE_DIR@"
-#define SLN_EXTENSION "sln-file"
-
-#endif
diff --git a/Tests/CMakeLib/testXMLParser.cxx b/Tests/CMakeLib/testXMLParser.cxx
index 32ee3ec0de..3b7af3aefa 100644
--- a/Tests/CMakeLib/testXMLParser.cxx
+++ b/Tests/CMakeLib/testXMLParser.cxx
@@ -1,9 +1,9 @@
-#include "testXMLParser.h"
-
 #include <iostream>
 
 #include "cmXMLParser.h"
 
+#include "testConfig.h"
+
 int testXMLParser(int /*unused*/, char* /*unused*/[])
 {
   // TODO: Derive from parser and check attributes.
diff --git a/Tests/CMakeLib/testXMLParser.h.in b/Tests/CMakeLib/testXMLParser.h.in
deleted file mode 100644
index da0b2757bd..0000000000
--- a/Tests/CMakeLib/testXMLParser.h.in
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef testXMLParser_h
-#define testXMLParser_h
-
-#define SOURCE_DIR "@CMAKE_CURRENT_SOURCE_DIR@"
-
-#endif