diff --git a/Makefile b/Makefile
index 5a123b2dd..37fb5285c 100644
--- a/Makefile
+++ b/Makefile
@@ -169,7 +169,7 @@ uninstall:
 coverage: ## generate coverprofiles from the unit tests, except tests that require root
 	@echo "$(WHALE) $@"
 	@rm -f coverage.txt
-	go test -i ${TESTFLAGS} $(filter-out ${INTEGRATION_PACKAGE},${PACKAGES})
+	@go test -i ${TESTFLAGS} $(filter-out ${INTEGRATION_PACKAGE},${PACKAGES})
 	( for pkg in $(filter-out ${INTEGRATION_PACKAGE},${PACKAGES}); do \
 		go test ${TESTFLAGS} \
 			-cover \
@@ -183,7 +183,7 @@ coverage: ## generate coverprofiles from the unit tests, except tests that requi
 
 root-coverage: ## generate coverage profiles for unit tests that require root
 	@echo "$(WHALE) $@"
-	go test -i ${TESTFLAGS} $(filter-out ${INTEGRATION_PACKAGE},${TEST_REQUIRES_ROOT_PACKAGES})
+	@go test -i ${TESTFLAGS} $(filter-out ${INTEGRATION_PACKAGE},${TEST_REQUIRES_ROOT_PACKAGES})
 	( for pkg in $(filter-out ${INTEGRATION_PACKAGE},${TEST_REQUIRES_ROOT_PACKAGES}); do \
 		go test ${TESTFLAGS} \
 			-cover \
diff --git a/content/local/store_test.go b/content/local/store_test.go
index 53788612a..55a96189b 100644
--- a/content/local/store_test.go
+++ b/content/local/store_test.go
@@ -179,10 +179,9 @@ func TestWalkBlobs(t *testing.T) {
 	defer cleanup()
 
 	const (
-		nblobs  = 4 << 10
+		nblobs  = 79
 		maxsize = 4 << 10
 	)
-
 	var (
 		blobs    = populateBlobStore(ctx, t, cs, nblobs, maxsize)
 		expected = map[digest.Digest]struct{}{}
@@ -251,7 +250,7 @@ func generateBlobs(t checker, nblobs, maxsize int64) map[digest.Digest][]byte {
 	for i := int64(0); i < nblobs; i++ {
 		p := make([]byte, mrand.Int63n(maxsize))
 
-		if _, err := rand.Read(p); err != nil {
+		if _, err := mrand.Read(p); err != nil {
 			t.Fatal(err)
 		}