diff --git a/utils/cache/spread_fs_test.go b/utils/cache/spread_fs_test.go
new file mode 100644
index 000000000..2b821d064
--- /dev/null
+++ b/utils/cache/spread_fs_test.go
@@ -0,0 +1,66 @@
+package cache
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Spread FS", func() {
+	var fs *spreadFS
+	var rootDir string
+
+	BeforeEach(func() {
+		var err error
+		rootDir, _ = ioutil.TempDir("", "spread_fs")
+		fs, err = NewSpreadFS(rootDir, 0755)
+		Expect(err).To(BeNil())
+	})
+
+	AfterEach(func() {
+		Expect(os.RemoveAll(rootDir)).To(BeNil())
+	})
+
+	Describe("KeyMapper", func() {
+		It("creates a file with proper name format", func() {
+			mapped := fs.KeyMapper("abc")
+			Expect(mapped).To(HavePrefix(fs.root))
+			mapped = strings.TrimPrefix(mapped, fs.root)
+			parts := strings.Split(mapped, string(filepath.Separator))
+			Expect(parts).To(HaveLen(4))
+			Expect(parts[3]).To(HaveLen(40))
+		})
+	})
+
+	Describe("Reload", func() {
+		var files []string
+
+		BeforeEach(func() {
+			files = []string{"aaaaa", "bbbbb", "ccccc"}
+			for _, content := range files {
+				file := fs.KeyMapper(content)
+				f, err := fs.Create(file)
+				Expect(err).To(BeNil())
+				_, _ = f.Write([]byte(content))
+				_ = f.Close()
+			}
+		})
+
+		It("loads all files from fs", func() {
+			var actual []string
+			err := fs.Reload(func(key string, name string) {
+				Expect(key).To(Equal(name))
+				data, err := ioutil.ReadFile(name)
+				Expect(err).To(BeNil())
+				actual = append(actual, string(data))
+			})
+			Expect(err).To(BeNil())
+			Expect(actual).To(HaveLen(len(files)))
+			Expect(actual).To(ContainElements(files[0], files[1], files[2]))
+		})
+	})
+})