diff --git a/test/Files_SerialIO/SerialIOTests.hpp b/test/Files_SerialIO/SerialIOTests.hpp
index 541d4dcaf1..05fd592f61 100644
--- a/test/Files_SerialIO/SerialIOTests.hpp
+++ b/test/Files_SerialIO/SerialIOTests.hpp
@@ -2,9 +2,11 @@
 
 namespace filebased_write_test
 {
+OPENPMDAPI_EXPORT
 auto close_and_reopen_iterations(std::string const &filename) -> void;
-}
+} // namespace filebased_write_test
 namespace close_and_reopen_test
 {
+OPENPMDAPI_EXPORT
 auto close_and_reopen_test() -> void;
-}
+} // namespace close_and_reopen_test
diff --git a/test/Files_SerialIO/close_iteration_test.cpp b/test/Files_SerialIO/close_iteration_test.cpp
index f4ab333636..4d10fb6fdb 100644
--- a/test/Files_SerialIO/close_iteration_test.cpp
+++ b/test/Files_SerialIO/close_iteration_test.cpp
@@ -1,6 +1,7 @@
 #include "SerialIOTests.hpp"
 #include "openPMD/IO/ADIOS/macros.hpp"
 #include "openPMD/IO/Access.hpp"
+#include "openPMD/auxiliary/Export.hpp"
 #include "openPMD/auxiliary/Filesystem.hpp"
 
 #include <catch2/catch.hpp>
@@ -269,6 +270,7 @@ auto run_test_groupbased(
     }
 }
 
+OPENPMDAPI_EXPORT
 auto close_and_reopen_test() -> void
 {
     run_test_filebased([](Series &s) { return s.iterations; }, "bp");
diff --git a/test/Files_SerialIO/filebased_write_test.cpp b/test/Files_SerialIO/filebased_write_test.cpp
index 0a7109ca2f..2d927021fa 100644
--- a/test/Files_SerialIO/filebased_write_test.cpp
+++ b/test/Files_SerialIO/filebased_write_test.cpp
@@ -1,5 +1,6 @@
 #include "SerialIOTests.hpp"
 #include "openPMD/IO/Access.hpp"
+#include "openPMD/auxiliary/Export.hpp"
 
 namespace filebased_write_test
 {
@@ -77,6 +78,7 @@ void close_and_reopen_iterations(
     }
 }
 
+OPENPMDAPI_EXPORT
 void close_and_reopen_iterations(std::string const &filename)
 {
     close_and_reopen_iterations(