diff --git a/cmake/HalideTestHelpers.cmake b/cmake/HalideTestHelpers.cmake
index 898ac399110a..808d4f675d55 100644
--- a/cmake/HalideTestHelpers.cmake
+++ b/cmake/HalideTestHelpers.cmake
@@ -102,13 +102,6 @@ function(add_halide_test TARGET)
         set_tests_properties(${TARGET} PROPERTIES PASS_REGULAR_EXPRESSION "Success!")
     endif ()
 
-    set_target_properties(${TARGET}
-        PROPERTIES
-        CXX_VISIBILITY_PRESET hidden
-        VISIBILITY_INLINES_HIDDEN TRUE
-    )
-
-
     if (WITH_SERIALIZATION AND WITH_SERIALIZATION_JIT_ROUNDTRIP_TESTING)
         if (NOT Halide_TARGET MATCHES "wasm")
             target_compile_definitions(${TARGET} PRIVATE WITH_SERIALIZATION_JIT_ROUNDTRIP_TESTING)
diff --git a/src/autoschedulers/CMakeLists.txt b/src/autoschedulers/CMakeLists.txt
index 631c1898b18c..1d70b3c29f00 100644
--- a/src/autoschedulers/CMakeLists.txt
+++ b/src/autoschedulers/CMakeLists.txt
@@ -2,7 +2,7 @@
 # Everything else should be omitted to keep binary size low.
 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS OFF)
 set(CMAKE_CXX_VISIBILITY_PRESET hidden)
-set(CMAKE_VISIBILITY_INLINES_HIDDEN YES)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN TRUE)
 
 function(add_autoscheduler)
     set(options)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index d828dc251994..ce2fedf56bba 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,6 +1,15 @@
 include(HalideTestHelpers)
 include(CheckCXXCompilerFlag)
 
+# All test targets in this directory (and its subdirectories) must be built
+# with the same visibility settings, since they reuse a common precompiled
+# <Halide.h> header via target_precompile_headers(REUSE_FROM) -- otherwise
+# Clang rejects the PCH with "default visibility for functions and variables
+# differs in PCH file vs. current file".
+set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS OFF)
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN TRUE)
+
 # _test_internal is not itself a test; it exists purely so that the other
 # test executables below can reuse its precompiled <Halide.h> header via
 # target_precompile_headers(REUSE_FROM). HalideTestHelpers depends on this