diff --git a/src/test/cpp/briey/makefile b/src/test/cpp/briey/makefile
index e0a024b0a..1e4f0f47f 100644
--- a/src/test/cpp/briey/makefile
+++ b/src/test/cpp/briey/makefile
@@ -48,7 +48,7 @@ run: compile
 verilate: ../../../../Briey.v
 	rm -f Briey.v*.bin
 	cp ../../../../Briey.v*.bin . | true
-	verilator -cc  ../../../../Briey.v -CFLAGS -std=c++11  ${ADDCFLAGS} --gdbbt ${VERILATOR_ARGS} -Wno-WIDTH -Wno-UNOPTFLAT --x-assign unique --exe main.cpp
+	verilator -cc  ../../../../Briey.v ${ADDCFLAGS} --gdbbt ${VERILATOR_ARGS} -Wno-WIDTH -Wno-UNOPTFLAT --x-assign unique --exe main.cpp
  	
 compile: verilate
 	make  -j  -C obj_dir/ -f VBriey.mk VBriey
diff --git a/src/test/cpp/murax/makefile b/src/test/cpp/murax/makefile
index 7c946ae7f..4f5a24382 100644
--- a/src/test/cpp/murax/makefile
+++ b/src/test/cpp/murax/makefile
@@ -31,7 +31,7 @@ run: compile
 verilate: ../../../../Murax.v
 	rm -f Murax.v*.bin
 	cp ../../../../Murax.v*.bin . | true
-	verilator -I../../../.. -cc  ../../../../Murax.v -CFLAGS -std=c++11  ${ADDCFLAGS} --gdbbt ${VERILATOR_ARGS} -Wno-WIDTH -Wno-UNOPTFLAT --x-assign unique --exe main.cpp
+	verilator -I../../../.. -cc  ../../../../Murax.v ${ADDCFLAGS} --gdbbt ${VERILATOR_ARGS} -Wno-WIDTH -Wno-UNOPTFLAT --x-assign unique --exe main.cpp
  	
 compile: verilate
 	make  -j  -C obj_dir/ -f VMurax.mk VMurax
diff --git a/src/test/cpp/regression/makefile b/src/test/cpp/regression/makefile
index 30d11b672..d113bbe57 100644
--- a/src/test/cpp/regression/makefile
+++ b/src/test/cpp/regression/makefile
@@ -350,7 +350,7 @@ run: compile
 
 verilate: ${VEXRISCV_FILE}
 	cp ${VEXRISCV_FILE}*.bin . | true
-	verilator -cc  ${VEXRISCV_FILE}  -O3 -CFLAGS -std=c++11 -LDFLAGS -pthread  ${ADDCFLAGS} --gdbbt ${VERILATOR_ARGS} -Wno-UNOPTFLAT -Wno-WIDTH --x-assign unique --exe main.cpp
+	verilator -cc  ${VEXRISCV_FILE}  -O3 -LDFLAGS -pthread ${ADDCFLAGS} --gdbbt ${VERILATOR_ARGS} -Wno-UNOPTFLAT -Wno-WIDTH --x-assign unique --exe main.cpp
  	
 compile: verilate
 	make  -j${THREAD_COUNT} -C obj_dir/ -f VVexRiscv.mk VVexRiscv