diff --git a/test/testit b/test/testit
index 21ec3a2..f34ab35 100755
--- a/test/testit
+++ b/test/testit
@@ -46,7 +46,7 @@ fi
 
 if [ -z "$CXX_LANG" ]
 then
-    CXX_LANG=c++14
+    CXX_LANG=c++17
 fi
 OPTIONS="-std=${CXX_LANG} $OPTIONS -I$ROOT -Wall $ROOT/src/tz.cpp -lcurl"