diff --git a/cmake/package-lock.cmake b/cmake/package-lock.cmake
index 6c93578470..557e4f11b1 100644
--- a/cmake/package-lock.cmake
+++ b/cmake/package-lock.cmake
@@ -13,8 +13,10 @@
 # Ideally, both are the same, which might not always be possible: https://github.com/cpm-cmake/CPM.cmake/issues/603
 # This is needed to support CPM_USE_LOCAL_PACKAGES
 
+# cmake-format: off
+
 # cereal
-set (SEQAN3_CEREAL_VERSION 1.3.2)
+set (SEQAN3_CEREAL_VERSION 1.3.2 CACHE STRING "" FORCE)
 CPMDeclarePackage (cereal
                    NAME cereal
                    VERSION ${SEQAN3_CEREAL_VERSION}
@@ -25,14 +27,14 @@ CPMDeclarePackage (cereal
 # Use URL download of the commit archive such that we do not clone submodules
 # Package name is still sdsl (name as v2 at xxsds/sdsl), but sdsl-lite is not currently being packaged
 # To avoid accidentally using the older sdsl, NAME is set to sdsl-lite
-set (SEQAN3_SDSL_VERSION 14cd017027ea742353fc5b500d1cb1d95896b77e)
+set (SEQAN3_SDSL_VERSION 14cd017027ea742353fc5b500d1cb1d95896b77e CACHE STRING "" FORCE)
 CPMDeclarePackage (sdsl-lite
                    NAME sdsl-lite
                    URL https://github.com/xxsds/sdsl-lite/archive/${SEQAN3_SDSL_VERSION}.tar.gz # master
                    DOWNLOAD_ONLY YES
                    QUIET YES)
 # benchmark
-set (SEQAN3_BENCHMARK_VERSION 1.9.1)
+set (SEQAN3_BENCHMARK_VERSION 1.9.1 CACHE STRING "" FORCE)
 CPMDeclarePackage (benchmark
                    NAME benchmark
                    VERSION ${SEQAN3_BENCHMARK_VERSION}
@@ -41,7 +43,7 @@ CPMDeclarePackage (benchmark
                    OPTIONS "BENCHMARK_ENABLE_TESTING OFF" "BENCHMARK_ENABLE_WERROR OFF"
                            "CMAKE_MESSAGE_LOG_LEVEL WARNING")
 # googletest
-set (SEQAN3_GOOGLETEST_VERSION 1.15.2)
+set (SEQAN3_GOOGLETEST_VERSION 1.15.2 CACHE STRING "" FORCE)
 CPMDeclarePackage (googletest
                    NAME GTest
                    VERSION ${SEQAN3_GOOGLETEST_VERSION}
@@ -49,7 +51,7 @@ CPMDeclarePackage (googletest
                    SYSTEM TRUE
                    OPTIONS "BUILD_GMOCK OFF" "INSTALL_GTEST OFF" "CMAKE_MESSAGE_LOG_LEVEL WARNING")
 # doxygen-awesome
-set (SEQAN3_DOXYGEN_AWESOME_VERSION 2.3.4)
+set (SEQAN3_DOXYGEN_AWESOME_VERSION 2.3.4 CACHE STRING "" FORCE)
 CPMDeclarePackage (doxygen_awesome
                    NAME doxygen_awesome
                    VERSION ${SEQAN3_DOXYGEN_AWESOME_VERSION}
@@ -57,7 +59,7 @@ CPMDeclarePackage (doxygen_awesome
                    DOWNLOAD_ONLY TRUE
                    QUIET YES)
 # seqan2
-set (SEQAN3_SEQAN2_VERSION 578218d744522c43bc9e769f14be9c26d7e5de85)
+set (SEQAN3_SEQAN2_VERSION 578218d744522c43bc9e769f14be9c26d7e5de85 CACHE STRING "" FORCE)
 CPMDeclarePackage (seqan
                    NAME seqan
                    GIT_TAG ${SEQAN3_SEQAN2_VERSION} # main
@@ -65,7 +67,7 @@ CPMDeclarePackage (seqan
                    DOWNLOAD_ONLY YES
                    QUIET YES)
 # use_ccache
-set (SEQAN3_USE_CCACHE_VERSION d2a54ef555b6fc2d496a4c9506dbeb7cf899ce37)
+set (SEQAN3_USE_CCACHE_VERSION d2a54ef555b6fc2d496a4c9506dbeb7cf899ce37 CACHE STRING "" FORCE)
 CPMDeclarePackage (use_ccache
                    NAME use_ccache
                    GIT_TAG ${SEQAN3_USE_CCACHE_VERSION} # main
@@ -73,3 +75,5 @@ CPMDeclarePackage (use_ccache
                    SOURCE_SUBDIR ccache
                    SYSTEM TRUE
                    EXCLUDE_FROM_ALL TRUE)
+
+# cmake-format: on
diff --git a/test/documentation/seqan3-doxygen.cmake b/test/documentation/seqan3-doxygen.cmake
index df21837c5e..84e0953468 100644
--- a/test/documentation/seqan3-doxygen.cmake
+++ b/test/documentation/seqan3-doxygen.cmake
@@ -65,6 +65,7 @@ else ()
     # subsequently deployed to a server.
     add_custom_target (download-cppreference-doxygen-web-tag)
     add_custom_command (TARGET download-cppreference-doxygen-web-tag
+                        POST_BUILD
                         COMMAND ${CMAKE_COMMAND} -E copy "${SEQAN3_DOXYGEN_STD_TAGFILE}"
                                 "${SEQAN3_DEFAULT_DOXYGEN_STD_TAGFILE}"
                         BYPRODUCTS "${SEQAN3_DEFAULT_DOXYGEN_STD_TAGFILE}")
diff --git a/test/documentation/seqan3_doxygen_cfg.in b/test/documentation/seqan3_doxygen_cfg.in
index 88f57408e1..4d02504fbf 100644
--- a/test/documentation/seqan3_doxygen_cfg.in
+++ b/test/documentation/seqan3_doxygen_cfg.in
@@ -161,7 +161,8 @@ RECURSIVE              = YES
 EXCLUDE                =
 EXCLUDE_SYMLINKS       = NO
 EXCLUDE_PATTERNS       = */doc/*.cpp \
-                         */contrib/std/* \
+                         */include/seqan3/contrib/std/* \
+                         */include/seqan3/vendor/* \
                          ${SEQAN3_DOXYGEN_EXCLUDE_PATTERNS}
 EXCLUDE_SYMBOLS        = seqan3::contrib \
                          ${SEQAN3_DOXYGEN_EXCLUDE_SYMBOLS}
diff --git a/test/header/CMakeLists.txt b/test/header/CMakeLists.txt
index 7ce68480e1..a800ce9432 100644
--- a/test/header/CMakeLists.txt
+++ b/test/header/CMakeLists.txt
@@ -131,7 +131,7 @@ endmacro ()
 
 # note: seqan3/contrib/std/* will not be tested, because they use local (#include "file") includes
 # note: seqan3/version.hpp is one of the only header that is not required to have a seqan3/core/platform.hpp include
-seqan3_header_test (seqan3 "${SEQAN3_CLONE_DIR}/include" "seqan3/version.hpp|seqan3/contrib/std")
+seqan3_header_test (seqan3 "${SEQAN3_CLONE_DIR}/include" "seqan3/version.hpp|seqan3/contrib/std|seqan3/vendor")
 seqan3_header_test (seqan3_test "${SEQAN3_CLONE_DIR}/test/include" "")
 
 if (SEQAN3_FULL_HEADER_TEST)
diff --git a/test/seqan3-test.cmake b/test/seqan3-test.cmake
index 28a7c80c85..83aa6f5fdb 100644
--- a/test/seqan3-test.cmake
+++ b/test/seqan3-test.cmake
@@ -23,8 +23,13 @@ find_package (SeqAn3 REQUIRED HINTS ${CMAKE_CURRENT_LIST_DIR}/../cmake)
 
 enable_testing ()
 
+set (SEQAN3_TEST_CPM_DIR
+     "${CMAKE_CURRENT_LIST_DIR}/../cmake/"
+     CACHE STRING "Path to directory containing CPM.cmake.")
+
 set (CPM_INDENT "CMake Package Manager CPM: ")
-CPMUsePackageLock ("${CMAKE_CURRENT_LIST_DIR}/../cmake/package-lock.cmake")
+include ("${SEQAN3_TEST_CPM_DIR}/CPM.cmake")
+CPMUsePackageLock ("${SEQAN3_TEST_CPM_DIR}/package-lock.cmake")
 
 include (CheckCXXCompilerFlag)
 include (CheckCXXSourceCompiles)