diff --git a/src/cfdp/tlv/mod.rs b/src/cfdp/tlv/mod.rs
index 1b90876..d1ab1b2 100644
--- a/src/cfdp/tlv/mod.rs
+++ b/src/cfdp/tlv/mod.rs
@@ -886,6 +886,41 @@ mod tests {
         assert!(tlv_empty.value().is_empty());
     }
 
+    #[test]
+    fn test_write_buf_too_small() {
+        let mut buf: [u8; 2] = [0; 2];
+        let fs_request =
+            FilestoreRequestTlv::new_create_file(Lv::new_from_str(TLV_TEST_STR_0).unwrap())
+                .unwrap();
+        let error = fs_request.write_to_bytes(&mut buf);
+        assert!(error.is_err());
+        let error = error.unwrap_err();
+        if let ByteConversionError::ToSliceTooSmall { found, expected } = error {
+            assert_eq!(found, 2);
+            assert_eq!(expected, 13);
+        } else {
+            panic!("unexpected error {:?}", error);
+        }
+    }
+
+    #[test]
+    fn test_read_from_buf_too_small() {
+        let buf: [u8; 1] = [0; 1];
+        let error = FilestoreRequestTlv::from_bytes(&buf);
+        assert!(error.is_err());
+        let error = error.unwrap_err();
+        if let TlvLvError::ByteConversion(ByteConversionError::FromSliceTooSmall {
+            found,
+            expected,
+        }) = error
+        {
+            assert_eq!(found, 1);
+            assert_eq!(expected, 2);
+        } else {
+            panic!("unexpected error {:?}", error);
+        }
+    }
+
     #[test]
     fn test_buf_too_large() {
         let buf_too_large: [u8; u8::MAX as usize + 1] = [0; u8::MAX as usize + 1];
@@ -1132,7 +1167,10 @@ mod tests {
         assert_eq!(written_len, 2 + 1 + lv_0.len_full() + 1);
         assert_eq!(buf[0], TlvType::FilestoreResponse as u8);
         assert_eq!(buf[1], written_len as u8 - 2);
-        assert_eq!((buf[2] >> 4) & 0b1111, FilestoreActionCode::CreateFile as u8);
+        assert_eq!(
+            (buf[2] >> 4) & 0b1111,
+            FilestoreActionCode::CreateFile as u8
+        );
         assert_eq!(buf[2] & 0b1111, 0b0001);
         let lv_read_back = Lv::from_bytes(&buf[3..]).unwrap();
         assert_eq!(lv_0, lv_read_back);
diff --git a/src/time/cds.rs b/src/time/cds.rs
index e72caaf..69efe94 100644
--- a/src/time/cds.rs
+++ b/src/time/cds.rs
@@ -2252,6 +2252,14 @@ mod tests {
         assert_eq!(stamp_small.ms_of_day(), 500);
     }
 
+    #[test]
+    fn test_update_from_now() {
+        let mut stamp = TimeProvider::new_with_u16_days(0, 0);
+        stamp.update_from_now();
+        let dt = stamp.as_date_time();
+        assert!(dt.year() > 2020);
+    }
+
     #[test]
     #[cfg(feature = "serde")]
     fn test_serialization() {