diff --git a/pve-rs/Makefile b/pve-rs/Makefile
index 68ff6dc..e452772 100644
--- a/pve-rs/Makefile
+++ b/pve-rs/Makefile
@@ -20,11 +20,18 @@ PM_DIR := PVE
 
 ifeq ($(BUILD_MODE), release)
 CARGO_BUILD_ARGS += --release
+TARGET_DIR=release
+else
+TARGET_DIR=debug
 endif
 
 all: PVE Proxmox/Lib/PVE.pm
 ifneq ($(BUILD_MODE), skip)
 	cargo build $(CARGO_BUILD_ARGS)
+	mkdir -p test/Proxmox/Lib
+	sed -r -e \
+	  's@^sub libdirs.*$$@sub libdirs { return ("../target/$(TARGET_DIR)", "../../target/$(TARGET_DIR)"); }@' \
+	  Proxmox/Lib/PVE.pm >test/Proxmox/Lib/PVE.pm
 endif
 
 PVE: ../scripts/genpackage.pl
@@ -38,6 +45,9 @@ Proxmox/Lib/PVE.pm: ../Proxmox/Lib/template.pm
 	mkdir -p Proxmox/Lib
 	$(call package_template,PVE,pve_rs,../)
 
+check: all
+	$(MAKE) -C test test
+
 # always re-create this dir
 # but also copy the local target/ and PVE/ dirs as a build-cache
 .PHONY: build
diff --git a/pve-rs/test/Makefile b/pve-rs/test/Makefile
index dc0a5bd..29dc955 100644
--- a/pve-rs/test/Makefile
+++ b/pve-rs/test/Makefile
@@ -1,4 +1,9 @@
 .PHONY: test
-test:
+test: Proxmox/Lib/PVE.pm
 	@echo "-- running pve-rs tests --"
-	./resource_scheduling.pl
+	perl -I. -I.. -I../.. ./resource_scheduling.pl
+
+# The test stub, we don't know where to look for the library from in here!
+Proxmox/Lib/PVE.pm:
+	@echo "run 'make' in the pve-rs/ dir first"
+	@exit 1