diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index e572dbb..d0afa78 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -7,6 +7,7 @@ add_executable(mach_detours_tests
         test_threads.cpp
         test_transaction.cpp
 )
+target_compile_options(mach_detours_tests PRIVATE "-O0")
 
 # The target function must be in a shared library because otherwise it might be in the same code page as the test.cpp functions.
 # Between attach and commit the target function's code page is not executable, which can mean our test driver code would not
@@ -15,10 +16,11 @@ add_library(mach_detours_tests_lib SHARED
         lib_function.c
         lib_function.h
 )
+target_compile_options(mach_detours_tests_lib PRIVATE "-O0")
 
 target_link_libraries(mach_detours_tests
         PRIVATE
             mach_detours
             Catch2::Catch2WithMain
             mach_detours_tests_lib
-)
\ No newline at end of file
+)
diff --git a/tests/test_local_function.cpp b/tests/test_local_function.cpp
index 49b2d60..2f29e06 100644
--- a/tests/test_local_function.cpp
+++ b/tests/test_local_function.cpp
@@ -4,6 +4,9 @@
 
 #include <mach_detours.h>
 
+// Note that this file must be compiled without optimizations (or at least without inlining)
+// else localFunction() calls below are likely going to be inlined at the call site, and detours will not work.
+
 static int localFunctionCounter = 0;
 int localFunction()
 {