diff --git a/container/types_test.go b/container/types_test.go
index c7dbbf8..cfd5f52 100644
--- a/container/types_test.go
+++ b/container/types_test.go
@@ -55,3 +55,23 @@ func TestCID(t *testing.T) {
 		require.Equal(t, cid1, cid2)
 	})
 }
+
+func TestAccessMode(t *testing.T) {
+	t.Run("read access to read/write mode", func(t *testing.T) {
+		require.Equal(t, AccessModeRead, AccessModeReadWrite&AccessModeRead)
+	})
+
+	t.Run("write access to read/write mode", func(t *testing.T) {
+		require.Equal(t, AccessModeWrite, AccessModeReadWrite&AccessModeWrite)
+	})
+
+	t.Run("read(write) access to write(read) mode", func(t *testing.T) {
+		require.Zero(t, AccessModeRead&AccessModeWrite)
+	})
+
+	t.Run("access to same mode", func(t *testing.T) {
+		require.Equal(t, AccessModeWrite, AccessModeWrite&AccessModeWrite)
+		require.Equal(t, AccessModeRead, AccessModeRead&AccessModeRead)
+		require.Equal(t, AccessModeReadWrite, AccessModeReadWrite&AccessModeReadWrite)
+	})
+}