diff --git a/.github/kokoro/db-full.sh b/.github/kokoro/db-full.sh
index 5fc5030d..c4113901 100755
--- a/.github/kokoro/db-full.sh
+++ b/.github/kokoro/db-full.sh
@@ -91,7 +91,8 @@ echo "----------------------------------------"
 # Generate extra files (additional part yaml's, harness, etc).
 set +e
 # Attempt to generate extras here, but don't check until after diff reporting.
-make db-extras-${XRAY_SETTINGS}
+make db-extras-${XRAY_SETTINGS}-harness
+make db-extras-${XRAY_SETTINGS}-parts -j $CORES
 EXTRAS_RET=$?
 set -e
 # Format the database
diff --git a/Makefile b/Makefile
index f86c8378..8697e820 100644
--- a/Makefile
+++ b/Makefile
@@ -161,7 +161,7 @@ $(foreach PART,$(XRAY_PARTS),$(eval $(call multiple-parts,$(PART))))
 
 db-extras-artix7-parts: $(addprefix db-part-only-,$(ARTIX_PARTS))
 
-db-extras-artix7:
+db-extras-artix7-harness:
 	+source minitests/roi_harness/basys3-swbut.sh && $(MAKE) -C fuzzers roi_only
 	+source minitests/roi_harness/arty-uart.sh && $(MAKE) -C fuzzers roi_only
 	+source minitests/roi_harness/basys3-swbut.sh && \
@@ -170,7 +170,7 @@ db-extras-artix7:
 	+source minitests/roi_harness/basys3-swbut.sh && \
 		$(MAKE) -C minitests/roi_harness \
 			XRAY_ROIV=../roi_base_div2.v \
-			HARNESS_DIR=$(XRAY_DATABASE_DIR)/artix7/harness/basys3/swbut_50 run copy
+			HARNESS_DIR=$(XRAY_DATABASE_DIR)/artix7/harness/basys3/swbut_50 copy
 	+source minitests/roi_harness/arty-uart.sh && \
 		$(MAKE) -C minitests/roi_harness \
 			HARNESS_DIR=$(XRAY_DATABASE_DIR)/artix7/harness/arty-a7/uart run copy
@@ -180,17 +180,20 @@ db-extras-artix7:
 	+source minitests/roi_harness/arty-swbut.sh && \
 		$(MAKE) -C minitests/roi_harness \
 			HARNESS_DIR=$(XRAY_DATABASE_DIR)/artix7/harness/arty-a7/swbut run copy
-	# Generate multiple part support
-	+$(MAKE) db-extras-artix7-parts
 
-db-extras-kintex7:
+db-extras-kintex7-parts:
 	@true
 
-db-extras-zynq7:
-	+source minitests/roi_harness/zybo-swbut.sh && $(MAKE) -C fuzzers roi_only
+db-extras-kintex7-harness:
+	@true
+
+db-extras-zynq7-parts:
+	@true
+
+db-extras-zynq7-harness:
 	+source minitests/roi_harness/zybo-swbut.sh && \
 		$(MAKE) -C minitests/roi_harness \
-			HARNESS_DIR=$(XRAY_DATABASE_DIR)/zynq7/harness/zybo/swbut run
+			HARNESS_DIR=$(XRAY_DATABASE_DIR)/zynq7/harness/zybo/swbut run copy
 
 db-check:
 	@true
diff --git a/fuzzers/Makefile b/fuzzers/Makefile
index addf2671..b58659b9 100644
--- a/fuzzers/Makefile
+++ b/fuzzers/Makefile
@@ -130,7 +130,7 @@ quick:
 # Part only targets
 # -----------------
 
-${XRAY_FAMILY_DIR}/${XRAY_PART}/part.yaml:
+$(addprefix ${XRAY_FAMILY_DIR}/${XRAY_PART}/part.,yaml json):
 	$(MAKE) -C 001-part-yaml run
 
 ${XRAY_FAMILY_DIR}/${XRAY_PART}/package_pins.csv:
@@ -144,7 +144,7 @@ ${XRAY_FAMILY_DIR}/${XRAY_PART}/tileconn.json:
 	$(MAKE) -C 073-get_counts run
 	$(MAKE) -C 074-dump_all run
 
-part_only_yaml: ${XRAY_FAMILY_DIR}/${XRAY_PART}/part.yaml
+part_only_yaml: $(addprefix ${XRAY_FAMILY_DIR}/${XRAY_PART}/part.,yaml json)
 part_only_tilegrid: ${XRAY_FAMILY_DIR}/${XRAY_PART}/tilegrid.json
 part_only_tileconn: ${XRAY_FAMILY_DIR}/${XRAY_PART}/tileconn.json
 part_only_pins: ${XRAY_FAMILY_DIR}/${XRAY_PART}/package_pins.csv