diff --git a/client/tests/CMakeLists.txt b/client/tests/CMakeLists.txt
index f5485aa3..0cf21960 100644
--- a/client/tests/CMakeLists.txt
+++ b/client/tests/CMakeLists.txt
@@ -49,6 +49,10 @@ set_target_properties(render-tests PROPERTIES
   CXX_STANDARD_REQUIRED ON
 )
 
+target_compile_options(render-tests PRIVATE
+  -fno-fast-math
+)
+
 target_compile_definitions(render-tests PRIVATE
   LG_CLIENT_PATH="$<TARGET_FILE:looking-glass-client>"
 )
diff --git a/client/transports/Test/CMakeLists.txt b/client/transports/Test/CMakeLists.txt
index d5ecce55..5b6c38c9 100644
--- a/client/transports/Test/CMakeLists.txt
+++ b/client/transports/Test/CMakeLists.txt
@@ -5,6 +5,10 @@ add_library(transport_Test STATIC
   test.c
 )
 
+target_compile_options(transport_Test PRIVATE
+  -fno-fast-math
+)
+
 target_link_libraries(transport_Test
   lg_common
 )