diff --git a/dev-tools/mage/gotest.go b/dev-tools/mage/gotest.go
index a5ab60e41d6..a259aa5fbd2 100644
--- a/dev-tools/mage/gotest.go
+++ b/dev-tools/mage/gotest.go
@@ -261,6 +261,7 @@ 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
 		)
 	}