Disable test cache to run all tests every time

Build and test times are still short enough and especially the
integration tests should be run every time.

Makefile

@@ -1,20 +1,22 @@
+# GOFLAGS="-count=1" disables the test cache so that all tests are run every time.
+
 all: test integration examples
 
 test:
-	go test -race ./...
+	GOFLAGS="-count=1" go test -race ./...
 
 lint:
 	staticcheck ./...
 
 integration:
-	go test -race -v -tags=integration ./uatest/...
+	GOFLAGS="-count=1" go test -race -v -tags=integration ./uatest/...
 
 examples:
 	go build -o build/ ./examples/...
 
 test-race:
-	go test -race ./...
-	go test -race -v -tags=integration ./uatest/...
+	GOFLAGS="-count=1" go test -race ./...
+	GOFLAGS="-count=1" go test -race -v -tags=integration ./uatest/...
 
 install-py-opcua:
 	pip3 install opcua