diff --git a/src/fs.rs b/src/fs.rs
index 7202259..e0c906e 100644
--- a/src/fs.rs
+++ b/src/fs.rs
@@ -311,7 +311,7 @@ impl FileSystemStats {
 /// A FAT filesystem object.
 ///
 /// `FileSystem` struct is representing a state of a mounted FAT volume.
-pub struct FileSystem<IO: ReadWriteSeek, TP, OCC> {
+pub struct FileSystem<IO: ReadWriteSeek, TP = DefaultTimeProvider, OCC = LossyOemCpConverter> {
     pub(crate) disk: RefCell<IO>,
     pub(crate) options: FsOptions<TP, OCC>,
     fat_type: FatType,
diff --git a/tests/format.rs b/tests/format.rs
index ee410e8..b5a4e30 100644
--- a/tests/format.rs
+++ b/tests/format.rs
@@ -1,15 +1,14 @@
 use std::io;
 use std::io::prelude::*;
 
-use fatfs::{DefaultTimeProvider, LossyOemCpConverter, StdIoWrapper};
+use fatfs::StdIoWrapper;
 use fscommon::BufStream;
 
 const KB: u64 = 1024;
 const MB: u64 = KB * 1024;
 const TEST_STR: &str = "Hi there Rust programmer!\n";
 
-type FileSystem =
-    fatfs::FileSystem<StdIoWrapper<BufStream<io::Cursor<Vec<u8>>>>, DefaultTimeProvider, LossyOemCpConverter>;
+type FileSystem = fatfs::FileSystem<StdIoWrapper<BufStream<io::Cursor<Vec<u8>>>>>;
 
 fn basic_fs_test(fs: &FileSystem) {
     let stats = fs.stats().expect("stats");
diff --git a/tests/read.rs b/tests/read.rs
index 9916489..ae12acb 100644
--- a/tests/read.rs
+++ b/tests/read.rs
@@ -3,7 +3,7 @@ use std::io::prelude::*;
 use std::io::SeekFrom;
 use std::str;
 
-use fatfs::{DefaultTimeProvider, FatType, FsOptions, LossyOemCpConverter, StdIoWrapper};
+use fatfs::{FatType, FsOptions, StdIoWrapper};
 use fscommon::BufStream;
 
 const TEST_TEXT: &str = "Rust is cool!\n";
@@ -11,7 +11,7 @@ const FAT12_IMG: &str = "resources/fat12.img";
 const FAT16_IMG: &str = "resources/fat16.img";
 const FAT32_IMG: &str = "resources/fat32.img";
 
-type FileSystem = fatfs::FileSystem<StdIoWrapper<BufStream<fs::File>>, DefaultTimeProvider, LossyOemCpConverter>;
+type FileSystem = fatfs::FileSystem<StdIoWrapper<BufStream<fs::File>>>;
 
 fn call_with_fs<F: Fn(FileSystem)>(f: F, filename: &str) {
     let _ = env_logger::builder().is_test(true).try_init();
diff --git a/tests/write.rs b/tests/write.rs
index e452263..3c1f9f6 100644
--- a/tests/write.rs
+++ b/tests/write.rs
@@ -4,7 +4,7 @@ use std::io::prelude::*;
 use std::mem;
 use std::str;
 
-use fatfs::{DefaultTimeProvider, FsOptions, LossyOemCpConverter, StdIoWrapper};
+use fatfs::{FsOptions, StdIoWrapper};
 use fscommon::BufStream;
 
 const FAT12_IMG: &str = "fat12.img";
@@ -15,7 +15,7 @@ const TMP_DIR: &str = "tmp";
 const TEST_STR: &str = "Hi there Rust programmer!\n";
 const TEST_STR2: &str = "Rust is cool!\n";
 
-type FileSystem = fatfs::FileSystem<StdIoWrapper<BufStream<fs::File>>, DefaultTimeProvider, LossyOemCpConverter>;
+type FileSystem = fatfs::FileSystem<StdIoWrapper<BufStream<fs::File>>>;
 
 fn call_with_tmp_img<F: Fn(&str)>(f: F, filename: &str, test_seq: u32) {
     let _ = env_logger::builder().is_test(true).try_init();