diff --git a/Makefile b/Makefile
index 475a863..f3cf771 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@
 MAX_THREADS ?= $(shell nproc)
 YY ?= 18
 
-.PHONY: all clean test krill index deploy server-log server-status
+.PHONY: all clean test i5 i5valid krill index deploy server-log server-status
 
 .PRECIOUS: %.zip %.tree_tagger.zip %.ud.zip %.marmot-malt.zip %.spacy.zip %.i5.xml %.tar
 
@@ -28,6 +28,12 @@
 test: $(TARGET_DIR)/dnb$(YY).i5.xml
 	xmllint --noout --valid $<
 
+i5: $(TARGET_DIR)/dnb$(YY).i5.xml
+	xmllint --noout $<
+
+i5valid: $(TARGET_DIR)/dnb$(YY).i5.xml
+	xmllint --noout --valid $<
+
 $(BUILD_DIR)/%: $(SRC_DIR)/%.epub
 	mkdir -p $@
 	echo "Converting $< to $@"