diff --git a/dev-tools/mage/gotest.go b/dev-tools/mage/gotest.go
index 5816ef98008..96c47c39126 100644
--- a/dev-tools/mage/gotest.go
+++ b/dev-tools/mage/gotest.go
@@ -257,6 +257,7 @@ func GoTest(ctx context.Context, params GoTestArgs) error {
 		testArgs = append(testArgs,
 			"-covermode=atomic",
 			"-coverprofile="+params.CoverageProfileFile,
+			"-coverpkg=./...", // needed to calculate the coverage across the elastic-agent packages
 		)
 	}