diff --git a/.gitlab/ci/ctest_exclusions.cmake b/.gitlab/ci/ctest_exclusions.cmake
index ed5e1dd694..a2789c3af8 100644
--- a/.gitlab/ci/ctest_exclusions.cmake
+++ b/.gitlab/ci/ctest_exclusions.cmake
@@ -34,13 +34,6 @@ if ("$ENV{CMAKE_CONFIGURATION}" MATCHES "nvhpc_")
     )
 endif()
 
-if ("$ENV{CMAKE_CONFIGURATION}" STREQUAL "windows_vs2022_x64_ninja")
-  list(APPEND test_exclusions
-    # FIXME(#25573): This test failure needs further investigation.
-    "^SwiftMixLib$"
-    )
-endif()
-
 string(REPLACE ";" "|" test_exclusions "${test_exclusions}")
 if (test_exclusions)
   set(test_exclusions "(${test_exclusions})")
diff --git a/Tests/SwiftMixLib/CMakeLists.txt b/Tests/SwiftMixLib/CMakeLists.txt
index d23c6bad0b..c2cfb8f4ff 100644
--- a/Tests/SwiftMixLib/CMakeLists.txt
+++ b/Tests/SwiftMixLib/CMakeLists.txt
@@ -10,3 +10,15 @@ target_link_libraries(Swifty PUBLIC SwiftMixedLib)
 
 add_executable(c_main main.c)
 target_link_libraries(c_main PUBLIC SwiftMixedLib)
+
+if(WIN32)
+  # TODO: On macOS and Linux, Swift has mechanism for determining what libraries
+  #       an object, or objects from a static archive, need to link against,
+  #       which is how the Swift driver is able to determine that `c_main`
+  #       needs to link swiftCore. Windows does not have this mechanism.
+  #       Eventually CMake should learn how to do this, explicitly forwarding
+  #       the required library to the link command when linking a static
+  #       archive containing Swift sources into something else, even if the
+  #       linker language is Swift.
+  target_link_libraries(c_main PRIVATE swiftCore)
+endif()