diff --git a/cache-tree.c b/cache-tree.c
index 90919f9e345..f21bfc631c6 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -440,8 +440,9 @@ static int update_one(struct cache_tree *it,
 	} else if (dryrun) {
 		hash_object_file(the_hash_algo, buffer.buf, buffer.len,
 				 tree_type, &it->oid);
-	} else if (write_object_file(buffer.buf, buffer.len, tree_type,
-				     &it->oid)) {
+	} else if (write_object_file_flags(buffer.buf, buffer.len, tree_type,
+					   &it->oid, flags & WRITE_TREE_SILENT
+					   ? HASH_SILENT : 0)) {
 		strbuf_release(&buffer);
 		return -1;
 	}
diff --git a/cache.h b/cache.h
index 3e5658c6dda..088f274fa17 100644
--- a/cache.h
+++ b/cache.h
@@ -887,6 +887,7 @@ int ie_modified(struct index_state *, const struct cache_entry *, struct stat *,
 #define HASH_WRITE_OBJECT 1
 #define HASH_FORMAT_CHECK 2
 #define HASH_RENORMALIZE  4
+#define HASH_SILENT 8
 int index_fd(struct index_state *istate, struct object_id *oid, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
 int index_path(struct index_state *istate, struct object_id *oid, const char *path, struct stat *st, unsigned flags);
 
diff --git a/object-file.c b/object-file.c
index 112d9b4badc..8fd67b07e45 100644
--- a/object-file.c
+++ b/object-file.c
@@ -1873,7 +1873,7 @@ static int create_tmpfile(struct strbuf *tmp, const char *filename)
 
 static int write_loose_object(const struct object_id *oid, char *hdr,
 			      int hdrlen, const void *buf, unsigned long len,
-			      time_t mtime)
+			      time_t mtime, unsigned flags)
 {
 	int fd, ret;
 	unsigned char compressed[4096];
@@ -1887,7 +1887,9 @@ static int write_loose_object(const struct object_id *oid, char *hdr,
 
 	fd = create_tmpfile(&tmp_file, filename.buf);
 	if (fd < 0) {
-		if (errno == EACCES)
+		if (flags & HASH_SILENT)
+			return -1;
+		else if (errno == EACCES)
 			return error(_("insufficient permission for adding an object to repository database %s"), get_object_directory());
 		else
 			return error_errno(_("unable to create temporary file"));
@@ -1937,7 +1939,8 @@ static int write_loose_object(const struct object_id *oid, char *hdr,
 		struct utimbuf utb;
 		utb.actime = mtime;
 		utb.modtime = mtime;
-		if (utime(tmp_file.buf, &utb) < 0)
+		if (utime(tmp_file.buf, &utb) < 0 &&
+		    !(flags & HASH_SILENT))
 			warning_errno(_("failed utime() on %s"), tmp_file.buf);
 	}
 
@@ -1962,8 +1965,9 @@ static int freshen_packed_object(const struct object_id *oid)
 	return 1;
 }
 
-int write_object_file(const void *buf, unsigned long len, const char *type,
-		      struct object_id *oid)
+int write_object_file_flags(const void *buf, unsigned long len,
+			    const char *type, struct object_id *oid,
+			    unsigned flags)
 {
 	char hdr[MAX_HEADER_LEN];
 	int hdrlen = sizeof(hdr);
@@ -1975,7 +1979,7 @@ int write_object_file(const void *buf, unsigned long len, const char *type,
 				  &hdrlen);
 	if (freshen_packed_object(oid) || freshen_loose_object(oid))
 		return 0;
-	return write_loose_object(oid, hdr, hdrlen, buf, len, 0);
+	return write_loose_object(oid, hdr, hdrlen, buf, len, 0, flags);
 }
 
 int hash_object_file_literally(const void *buf, unsigned long len,
@@ -1995,7 +1999,7 @@ int hash_object_file_literally(const void *buf, unsigned long len,
 		goto cleanup;
 	if (freshen_packed_object(oid) || freshen_loose_object(oid))
 		goto cleanup;
-	status = write_loose_object(oid, header, hdrlen, buf, len, 0);
+	status = write_loose_object(oid, header, hdrlen, buf, len, 0, 0);
 
 cleanup:
 	free(header);
@@ -2017,7 +2021,7 @@ int force_object_loose(const struct object_id *oid, time_t mtime)
 	if (!buf)
 		return error(_("cannot read object for %s"), oid_to_hex(oid));
 	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(type), (uintmax_t)len) + 1;
-	ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime);
+	ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime, 0);
 	free(buf);
 
 	return ret;
diff --git a/object-store.h b/object-store.h
index c5130d8baea..f5b9e016107 100644
--- a/object-store.h
+++ b/object-store.h
@@ -223,8 +223,14 @@ int hash_object_file(const struct git_hash_algo *algo, const void *buf,
 		     unsigned long len, const char *type,
 		     struct object_id *oid);
 
-int write_object_file(const void *buf, unsigned long len,
-		      const char *type, struct object_id *oid);
+int write_object_file_flags(const void *buf, unsigned long len,
+			    const char *type, struct object_id *oid,
+			    unsigned flags);
+static inline int write_object_file(const void *buf, unsigned long len,
+				    const char *type, struct object_id *oid)
+{
+	return write_object_file_flags(buf, len, type, oid, 0);
+}
 
 int hash_object_file_literally(const void *buf, unsigned long len,
 			       const char *type, struct object_id *oid,
diff --git a/t/t0004-unwritable.sh b/t/t0004-unwritable.sh
index 998c9d1be69..75c6d5c8b49 100755
--- a/t/t0004-unwritable.sh
+++ b/t/t0004-unwritable.sh
@@ -33,7 +33,6 @@ test_expect_success POSIXPERM,SANITY 'commit should notice unwritable repository
 
 	cat >expect <<-\EOF &&
 	error: insufficient permission for adding an object to repository database .git/objects
-	error: insufficient permission for adding an object to repository database .git/objects
 	error: Error building trees
 	EOF
 	test_must_fail git commit -m second 2>actual &&
