diff --git a/cryptest.sh b/cryptest.sh
index b4321601..4d61d6c9 100755
--- a/cryptest.sh
+++ b/cryptest.sh
@@ -784,7 +784,7 @@ if [ "$CXX" == "g++" ] && [ "$HAVE_CXX11" -ne "0" ]; then
 
 	unset CXXFLAGS
 	"$MAKE" clean > /dev/null 2>&1
-	export CXXFLAGS="-DDEBUG -g2 -O2 -std=c++11 -DCRYPTOPP_NO_BACKWARDS_COMPATIBILITY_562 -Wall -Wextra -Wno-unknown-pragmas"
+	export CXXFLAGS="-DDEBUG -g2 -O2 -std=c++11 -DCRYPTOPP_NO_BACKWARDS_COMPATIBILITY_562 -Wall -Wextra -Wno-unknown-pragmas -Wstrict-aliasing=3 -Wstrict-overflow -Waggressive-loop-optimizations"
 	"$MAKE" static dynamic cryptest.exe 2>&1 | tee -a "$WARN_TEST_RESULTS"
 
 	############################################
@@ -796,7 +796,7 @@ if [ "$CXX" == "g++" ] && [ "$HAVE_CXX11" -ne "0" ]; then
 
 	unset CXXFLAGS
 	"$MAKE" clean > /dev/null 2>&1
-	export CXXFLAGS="-DNDEBUG -g2 -O2 -std=c++11 -DCRYPTOPP_NO_BACKWARDS_COMPATIBILITY_562 -Wall -Wextra -Wno-unknown-pragmas"
+	export CXXFLAGS="-DNDEBUG -g2 -O2 -std=c++11 -DCRYPTOPP_NO_BACKWARDS_COMPATIBILITY_562 -Wall -Wextra -Wno-unknown-pragmas -Wstrict-aliasing=3 -Wstrict-overflow -Waggressive-loop-optimizations"
 	"$MAKE" static dynamic cryptest.exe 2>&1 | tee -a "$WARN_TEST_RESULTS"
 fi