diff --git a/Makefile b/Makefile
index 4177d7856e59..9f2e5b3828fb 100644
--- a/Makefile
+++ b/Makefile
@@ -121,6 +121,7 @@ help:
 	@echo " - vet               examines Go source code and reports suspicious constructs"
 	@echo " - test              run unit test"
 	@echo " - test-sqlite       run integration test for sqlite"
+	@echo " - pr#<index>        build and start gitea from a PR with integration test data loaded"
 
 .PHONY: go-check
 go-check:
@@ -565,7 +566,7 @@ generate-images:
 	$(foreach file, $(shell find public/img -type f -name '*.png' ! -name 'loading.png'),zopflipng -m -y $(file) $(file);)
 
 .PHONY: pr\#%
-pr\#%:
+pr\#%: clean-all
 	$(GO) run contrib/pr/checkout.go $*
 
 .PHONY: golangci-lint
diff --git a/contrib/pr/checkout.go b/contrib/pr/checkout.go
index 34cd82ff0a38..1f387f824e89 100644
--- a/contrib/pr/checkout.go
+++ b/contrib/pr/checkout.go
@@ -247,7 +247,8 @@ func main() {
 			log.Fatalf("Failed to duplicate this code file in PR : %v", err)
 		}
 	}
-	time.Sleep(5 * time.Second)
+	//Force build of js, css, bin, ...
+	runCmd("make", "build")
 	//Start with integration test
 	runCmd("go", "run", "-tags", "sqlite sqlite_unlock_notify", codeFilePath, "-run")
 }