diff --git a/coverage.sh b/coverage.sh
index b9f576f2c..4e08ff1ac 100755
--- a/coverage.sh
+++ b/coverage.sh
@@ -3,8 +3,8 @@
 export ZINC_FIRST_ADMIN_USER=admin  
 export ZINC_FIRST_ADMIN_PASSWORD=Complexpass#123
 
-find ./pkg -name data -type dir|xargs rm -fR
-find ./test -name data -type dir|xargs rm -fR
+find ./pkg -name data -type d|xargs rm -fR
+find ./test -name data -type d|xargs rm -fR
 
 go test ./... -race -covermode=atomic -coverprofile=coverage.out
 
@@ -16,13 +16,13 @@ go test ./... -race -covermode=atomic -coverprofile=coverage.out
 # Example setup https://github.com/lluuiissoo/go-testcoverage/blob/main/.github/workflows/ci.yml
 
 # enable threshold
-COVERAGE_THRESHOLD=20
+COVERAGE_THRESHOLD=81
 
 totalCoverage=`go tool cover -func=coverage.out | grep total | grep -Eo '[0-9]+\.[0-9]'`
 
 # clean up
-find ./pkg -name data -type dir|xargs rm -fR
-find ./test -name data -type dir|xargs rm -fR
+find ./pkg -name data -type d|xargs rm -fR
+find ./test -name data -type d|xargs rm -fR
 rm coverage.out
 # clean up finished