diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7edcb79f1d..f31289ea8b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1102,19 +1102,19 @@ if(openPMD_BUILD_TESTING)
                         ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}
                 )
                 if(WIN32)
-                    string(REGEX REPLACE "/" "\\\\" WIN_BUILD_BASEDIR ${openPMD_BINARY_DIR})
+                    string(REGEX REPLACE "/" "\\\\" WIN_BUILD_PYDIR ${CMAKE_PYTHON_OUTPUT_DIRECTORY})
                     string(REGEX REPLACE "/" "\\\\" WIN_BUILD_BINDIR ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
                     string(REPLACE ";" "\\;" WIN_PATH "$ENV{PATH}")
                     string(REPLACE ";" "\\;" WIN_PYTHONPATH "$ENV{PYTHONPATH}")
                     set_property(TEST Unittest.py
                         PROPERTY ENVIRONMENT
                             "PATH=${WIN_BUILD_BINDIR}\\${CMAKE_BUILD_TYPE}\;${WIN_PATH}\n"
-                            "PYTHONPATH=${WIN_BUILD_BASEDIR}\\${CMAKE_INSTALL_PYTHONDIR}\\${CMAKE_BUILD_TYPE}\;${WIN_PYTHONPATH}"
+                            "PYTHONPATH=${WIN_BUILD_PYDIR}\;${WIN_PYTHONPATH}"
                     )
                 else()
                     set_tests_properties(Unittest.py
                         PROPERTIES ENVIRONMENT
-                            "PYTHONPATH=${openPMD_BINARY_DIR}/${CMAKE_INSTALL_PYTHONDIR}:$ENV{PYTHONPATH}"
+                            "PYTHONPATH=${CMAKE_PYTHON_OUTPUT_DIRECTORY}:$ENV{PYTHONPATH}"
                     )
                 endif()
             endif()
@@ -1172,15 +1172,19 @@ if(openPMD_BUILD_TESTING)
 
     function(test_set_pythonpath test_name)
         if(WIN32)
+            string(REGEX REPLACE "/" "\\\\" WIN_BUILD_PYDIR ${CMAKE_PYTHON_OUTPUT_DIRECTORY})
+            string(REGEX REPLACE "/" "\\\\" WIN_BUILD_BINDIR ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
+            string(REPLACE ";" "\\;" WIN_PATH "$ENV{PATH}")
+            string(REPLACE ";" "\\;" WIN_PYTHONPATH "$ENV{PYTHONPATH}")
             set_property(TEST ${test_name}
                 PROPERTY ENVIRONMENT
                     "PATH=${WIN_BUILD_BINDIR}\\${CMAKE_BUILD_TYPE}\;${WIN_PATH}\n"
-                    "PYTHONPATH=${WIN_BUILD_BASEDIR}\\${CMAKE_INSTALL_PYTHONDIR}\\${CMAKE_BUILD_TYPE}\;${WIN_PYTHONPATH}"
+                    "PYTHONPATH=${WIN_BUILD_PYDIR}\;${WIN_PYTHONPATH}"
             )
         else()
             set_tests_properties(${test_name}
                 PROPERTIES ENVIRONMENT
-                    "PYTHONPATH=${openPMD_BINARY_DIR}/${CMAKE_INSTALL_PYTHONDIR}:$ENV{PYTHONPATH}"
+                    "PYTHONPATH=${CMAKE_PYTHON_OUTPUT_DIRECTORY}:$ENV{PYTHONPATH}"
             )
         endif()
     endfunction()
@@ -1301,19 +1305,19 @@ if(openPMD_BUILD_TESTING)
                         )
                     endif()
                     if(WIN32)
-                        string(REGEX REPLACE "/" "\\\\" WIN_BUILD_BASEDIR ${openPMD_BINARY_DIR})
+                        string(REGEX REPLACE "/" "\\\\" WIN_BUILD_PYDIR ${CMAKE_PYTHON_OUTPUT_DIRECTORY})
                         string(REGEX REPLACE "/" "\\\\" WIN_BUILD_BINDIR ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
                         string(REPLACE ";" "\\;" WIN_PATH "$ENV{PATH}")
                         string(REPLACE ";" "\\;" WIN_PYTHONPATH "$ENV{PYTHONPATH}")
                         set_property(TEST Example.py.${examplename}
                             PROPERTY ENVIRONMENT
                                 "PATH=${WIN_BUILD_BINDIR}\\${CMAKE_BUILD_TYPE}\;${WIN_PATH}\n"
-                                "PYTHONPATH=${WIN_BUILD_BASEDIR}\\${CMAKE_INSTALL_PYTHONDIR}\\${CMAKE_BUILD_TYPE}\;${WIN_PYTHONPATH}"
+                                "PYTHONPATH=${WIN_BUILD_PYDIR}\;${WIN_PYTHONPATH}"
                         )
                     else()
                         set_tests_properties(Example.py.${examplename}
                             PROPERTIES ENVIRONMENT
-                                "PYTHONPATH=${openPMD_BINARY_DIR}/${CMAKE_INSTALL_PYTHONDIR}:$ENV{PYTHONPATH}"
+                                "PYTHONPATH=${CMAKE_PYTHON_OUTPUT_DIRECTORY}:$ENV{PYTHONPATH}"
                         )
                     endif()
                 endif()
@@ -1334,6 +1338,15 @@ message("  C++ Compiler: ${CMAKE_CXX_COMPILER_ID} "
                         "${CMAKE_CXX_COMPILER_WRAPPER}")
 message("    ${CMAKE_CXX_COMPILER}")
 message("")
+message("  Build prefix: ${openPMD_BINARY_DIR}")
+message("        bin: ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}")
+message("        lib: ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}")
+#message("    include: ...")
+#message("      cmake: ...")
+if(openPMD_HAVE_PYTHON)
+    message("     python: ${CMAKE_PYTHON_OUTPUT_DIRECTORY}")
+endif()
+message("")
 if(openPMD_INSTALL)
     message("  Installation prefix: ${CMAKE_INSTALL_PREFIX}")
     message("        bin: ${CMAKE_INSTALL_BINDIR}")