diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 88a3c5c..61cf8c2 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -102,7 +102,7 @@ if(MSVC) # MSVC or simulating MSVC
         >
     )
 else()
-    target_compile_options(gsl_tests_config PRIVATE
+    target_compile_options(gsl_tests_config INTERFACE
         -fno-strict-aliasing
         -Wall
         -Wcast-align
diff --git a/tests/CMakeLists.txt.in b/tests/CMakeLists.txt.in
index 2535f8f..059fc7d 100644
--- a/tests/CMakeLists.txt.in
+++ b/tests/CMakeLists.txt.in
@@ -11,4 +11,5 @@ ExternalProject_Add(googletest
   BUILD_COMMAND     ""
   INSTALL_COMMAND   ""
   TEST_COMMAND      ""
+  CMAKE_ARGS        -Wno-dev
 )