diff --git a/Makefile b/Makefile
index f2072dc..803418c 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ TARGET ?= JayFilter.so
 
 CFLAGS += -fPIC
 CXXFLAGS += -fPIC
-CXXFLAGS += -std=c++11
+CXXFLAGS += -std=c++20
 
 VST2_SDK_PATH := $(realpath sdk/vst/vstsdk2.4)
 INCLUDES += -I $(realpath src)
@@ -23,5 +23,8 @@ LDFLAGS += $(TARGET_ARCH) $(LIBDIR) -shared
 
 all: link
 
+test:
+	make -C ./submodules/dsp/delay/tests/
+
 include $(MAKE_HOME)/compile.mk
 include $(MAKE_HOME)/link.mk