diff --git a/core/coreunix/add_test.go b/core/coreunix/add_test.go
index eb2e70a68..b1f5be3c9 100644
--- a/core/coreunix/add_test.go
+++ b/core/coreunix/add_test.go
@@ -7,6 +7,7 @@ import (
 	"io/ioutil"
 	"math/rand"
 	"os"
+	"path/filepath"
 	"testing"
 	"time"
 
@@ -176,7 +177,7 @@ func testAddWPosInfo(t *testing.T, rawLeaves bool) {
 		t.Fatal(err)
 	}
 
-	bs := &testBlockstore{GCBlockstore: node.Blockstore, expectedPath: "/tmp/foo.txt", t: t}
+	bs := &testBlockstore{GCBlockstore: node.Blockstore, expectedPath: filepath.Join(os.TempDir(), "foo.txt"), t: t}
 	bserv := blockservice.New(bs, node.Exchange)
 	dserv := dag.NewDAGService(bserv)
 	adder, err := NewAdder(context.Background(), node.Pinning, bs, dserv)
@@ -193,7 +194,7 @@ func testAddWPosInfo(t *testing.T, rawLeaves bool) {
 	rand.New(rand.NewSource(2)).Read(data) // Rand.Read never returns an error
 	fileData := ioutil.NopCloser(bytes.NewBuffer(data))
 	fileInfo := dummyFileInfo{"foo.txt", int64(len(data)), time.Now()}
-	file := files.NewReaderFile(fileData, &fileInfo)
+	file, _ := files.NewReaderPathFile(filepath.Join(os.TempDir(), "foo.txt"), fileData, &fileInfo)
 
 	go func() {
 		defer close(adder.Out)
@@ -212,7 +213,7 @@ func testAddWPosInfo(t *testing.T, rawLeaves bool) {
 		nonOffZero = 19
 	}
 	if bs.countAtOffsetZero != exp {
-		t.Fatalf("expected %d blocks with an offset at zero (one root and one leafh), got %d", exp, bs.countAtOffsetZero)
+		t.Fatalf("expected %d blocks with an offset at zero (one root and one leaf), got %d", exp, bs.countAtOffsetZero)
 	}
 	if bs.countAtOffsetNonZero != nonOffZero {
 		// note: the exact number will depend on the size and the sharding algo. used