diff --git a/internal/archiver/archiver_test.go b/internal/archiver/archiver_test.go
index e84d4c0b9..6fc5ab648 100644
--- a/internal/archiver/archiver_test.go
+++ b/internal/archiver/archiver_test.go
@@ -832,7 +832,7 @@ func TestArchiverSaveDir(t *testing.T) {
 			if stats.DataBlobs != 0 {
 				t.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
 			}
-			if stats.TreeSize <= 0 {
+			if stats.TreeSize == 0 {
 				t.Errorf("wrong stats returned in TreeSize, want > 0, got %d", stats.TreeSize)
 			}
 			if stats.TreeBlobs <= 0 {
@@ -910,7 +910,7 @@ func TestArchiverSaveDirIncremental(t *testing.T) {
 			if stats.DataBlobs != 0 {
 				t.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
 			}
-			if stats.TreeSize <= 0 {
+			if stats.TreeSize == 0 {
 				t.Errorf("wrong stats returned in TreeSize, want > 0, got %d", stats.TreeSize)
 			}
 			if stats.TreeBlobs <= 0 {
diff --git a/internal/backend/semaphore.go b/internal/backend/semaphore.go
index 2146db2f3..28b97472b 100644
--- a/internal/backend/semaphore.go
+++ b/internal/backend/semaphore.go
@@ -2,8 +2,9 @@ package backend
 
 import (
 	"context"
-	"github.com/restic/restic/internal/errors"
 	"io"
+
+	"github.com/restic/restic/internal/errors"
 )
 
 // Semaphore limits access to a restricted resource.
@@ -13,7 +14,7 @@ type Semaphore struct {
 
 // NewSemaphore returns a new semaphore with capacity n.
 func NewSemaphore(n uint) (*Semaphore, error) {
-	if n <= 0 {
+	if n == 0 {
 		return nil, errors.New("must be a positive number")
 	}
 	return &Semaphore{