diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index f1095b369..d816ebc33 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -141,19 +141,19 @@ if (MSVC)
     if (MSVC_VERSION LESS_EQUAL 1900)
         target_compile_options(unit_tests PUBLIC
             # C4503: decorated name length exceeded
-            /wd"4503"
+            /wd4503
             # C4800: forcing value to bool (performance warning)
-            /wd"4800")
+            /wd4800)
     else()
         target_compile_options(unit_tests PUBLIC
             # warning-level 4
             /W4
             # C4127: conditional expression is constant
-            /wd"4127"
+            /wd4127
             # C4456: declaration of 'symbol' hides previous local declaration
-            /wd"4456"
+            /wd4456
             # C4458: declaration of 'symbol' hides class member
-            /wd"4458")
+            /wd4458)
     endif()
 endif()