diff --git a/backup/archive_test.go b/backup/archive_test.go
index a4e6812..c8bde86 100644
--- a/backup/archive_test.go
+++ b/backup/archive_test.go
@@ -25,7 +25,7 @@ func readZipEntry(t *testing.T, data []byte, name string) []byte {
 			if err != nil {
 				t.Fatalf("open %s: %v", name, err)
 			}
-			defer rc.Close()
+			defer func() { _ = rc.Close() }()
 			b, err := io.ReadAll(rc)
 			if err != nil {
 				t.Fatalf("read %s: %v", name, err)
diff --git a/backup/manifest.go b/backup/manifest.go
index a7594da..4498f1d 100644
--- a/backup/manifest.go
+++ b/backup/manifest.go
@@ -56,7 +56,7 @@ func ReadManifest(r io.ReaderAt, size int64) (*Manifest, error) {
 		if err != nil {
 			return nil, fmt.Errorf("failed to open manifest.json: %w", err)
 		}
-		defer rc.Close()
+		defer func() { _ = rc.Close() }()
 
 		data, err := io.ReadAll(rc)
 		if err != nil {