diff --git a/main.go b/main.go
index 0ec835ff..f2280590 100644
--- a/main.go
+++ b/main.go
@@ -66,18 +66,18 @@ func main() {
 func run(ctx *cli.Context) error {
 	c, err := config.Get(ctx)
 	if err != nil {
-		fmt.Fprintf(ctx.App.Writer, "%v\n\n", err)
+		_, _ = fmt.Fprintf(ctx.App.Writer, "%v\n\n", err)
 		_ = cli.ShowAppHelp(ctx)
 		return cli.Exit(err.Error(), 1)
 	}
 
 	if ctx.NArg() > 0 {
-		fmt.Fprintf(ctx.App.Writer,
+		_, _ = fmt.Fprintf(ctx.App.Writer,
 			"Error: bazel-remote does not take positional aguments\n")
 		for i := 0; i < ctx.NArg(); i++ {
-			fmt.Fprintf(ctx.App.Writer, "arg: %s\n", ctx.Args().Get(i))
+			_, _ = fmt.Fprintf(ctx.App.Writer, "arg: %s\n", ctx.Args().Get(i))
 		}
-		fmt.Fprintf(ctx.App.Writer, "\n")
+		_, _ = fmt.Fprintf(ctx.App.Writer, "\n")
 
 		_ = cli.ShowAppHelp(ctx)
 		os.Exit(1)
diff --git a/server/grpc_asset.go b/server/grpc_asset.go
index 8e22e3c2..dad68231 100644
--- a/server/grpc_asset.go
+++ b/server/grpc_asset.go
@@ -202,7 +202,7 @@ func (s *grpcServer) fetchItem(ctx context.Context, uri string, headers http.Hea
 
 	if u.Scheme != "http" && u.Scheme != "https" {
 		s.errorLogger.Printf("unsupported URI: %s", uri)
-		return "", int64(-1), fmt.Errorf("Unknown URL scheme: %q", u.Scheme)
+		return "", int64(-1), fmt.Errorf("unknown URL scheme: %q", u.Scheme)
 	}
 
 	req, err := http.NewRequest(http.MethodGet, uri, nil)
@@ -223,7 +223,7 @@ func (s *grpcServer) fetchItem(ctx context.Context, uri string, headers http.Hea
 
 	s.accessLogger.Printf("GRPC ASSET FETCH %s %s", uri, resp.Status)
 	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
-		return "", int64(-1), fmt.Errorf("Unsuccessful HTTP status code: %d", resp.StatusCode)
+		return "", int64(-1), fmt.Errorf("unsuccessful HTTP status code: %d", resp.StatusCode)
 	}
 
 	expectedSize := resp.ContentLength
diff --git a/server/grpc_cas.go b/server/grpc_cas.go
index dfaba418..24361357 100644
--- a/server/grpc_cas.go
+++ b/server/grpc_cas.go
@@ -455,7 +455,7 @@ func (s *grpcServer) SpliceBlob(ctx context.Context, req *pb.SpliceBlobRequest)
 			rc, _, err := s.cache.Get(ctx, cache.CAS, chunkDigest.Hash, chunkDigest.SizeBytes, 0)
 			if err != nil {
 				if rc != nil {
-					rc.Close()
+					_ = rc.Close()
 				}
 
 				return nil, grpc_status.Errorf(codes.Unknown,
@@ -474,20 +474,20 @@ func (s *grpcServer) SpliceBlob(ctx context.Context, req *pb.SpliceBlobRequest)
 
 			copiedBytes, err := io.Copy(hasher, rc)
 			if err != nil {
-				rc.Close()
+				_ = rc.Close()
 				return nil, grpc_status.Errorf(codes.Unknown,
 					"SpliceBlob failed to copy chunk %s/%d: %s",
 					chunkDigest.Hash, chunkDigest.SizeBytes, err)
 			}
 
 			if copiedBytes != chunkDigest.SizeBytes {
-				rc.Close()
+				_ = rc.Close()
 				return nil, grpc_status.Errorf(codes.Unknown,
 					"SpliceBlob copied unpexpected number of bytes (%d) from chunk %s/%d",
 					copiedBytes, chunkDigest.Hash, chunkDigest.SizeBytes)
 			}
 
-			rc.Close()
+			_ = rc.Close()
 		}
 
 		req.BlobDigest = &pb.Digest{
@@ -539,13 +539,13 @@ func (s *grpcServer) SpliceBlob(ctx context.Context, req *pb.SpliceBlobRequest)
 	writerResultChan := make(chan error, 1)
 
 	go func() {
-		defer pw.Close()
+		defer func() { _ = pw.Close() }()
 
 		for _, chunkDigest := range req.ChunkDigests {
 			rc, _, err := s.cache.Get(ctx, cache.CAS, chunkDigest.Hash, chunkDigest.SizeBytes, 0)
 			if err != nil {
 				if rc != nil {
-					rc.Close()
+					_ = rc.Close()
 				}
 				writerResultChan <- grpc_status.Errorf(codes.Unknown,
 					"SpliceBlob failed to get chunk %s/%d: %s",
@@ -565,7 +565,7 @@ func (s *grpcServer) SpliceBlob(ctx context.Context, req *pb.SpliceBlobRequest)
 
 			copiedBytes, err := io.Copy(pw, rc)
 			if err != nil {
-				rc.Close()
+				_ = rc.Close()
 				writerResultChan <- grpc_status.Errorf(codes.Unknown,
 					"SpliceBlob failed to copy chunk %s/%d: %s",
 					chunkDigest.Hash, chunkDigest.SizeBytes, err)
@@ -573,14 +573,14 @@ func (s *grpcServer) SpliceBlob(ctx context.Context, req *pb.SpliceBlobRequest)
 			}
 
 			if copiedBytes != chunkDigest.SizeBytes {
-				rc.Close()
+				_ = rc.Close()
 				writerResultChan <- grpc_status.Errorf(codes.Unknown,
 					"SpliceBlob copied unpexpected number of bytes (%d) from chunk %s/%d",
 					copiedBytes, chunkDigest.Hash, chunkDigest.SizeBytes)
 				return
 			}
 
-			rc.Close()
+			_ = rc.Close()
 		}
 
 		writerResultChan <- nil