diff --git a/src/chunks.rs b/src/chunks.rs
index d5adaea..473e1df 100644
--- a/src/chunks.rs
+++ b/src/chunks.rs
@@ -146,7 +146,7 @@ impl GenericChunk {
     /// Compresses the data of the chunk using lzma with a level of 6
     pub fn compress(&mut self) -> Result<(), Error> {
         let data = self.data.as_slice();
-        let mut compressor = XzEncoder::new(data, 6);
+        let mut compressor = XzEncoder::new(data, 1);
         let mut compressed: Vec<u8> = Vec::new();
         compressor.read_to_end(&mut compressed)?;
         self.length = compressed.len() as u32;
diff --git a/src/io.rs b/src/io.rs
index 1bc1108..d3d78c3 100644
--- a/src/io.rs
+++ b/src/io.rs
@@ -40,7 +40,7 @@ impl BDFWriter {
     }
 
     /// Adds an entry to the hash lookup table
-    /// If the lookup table has already been written to the file, an error ris returned
+    /// If the lookup table has already been written to the file, an error is returned
     pub fn add_lookup_entry(&mut self, mut entry: HashEntry) -> Result<u32, Error> {
         if self.head_written {
             return Err(Error::new(
diff --git a/src/lib.rs b/src/lib.rs
index c12a4ba..cecff83 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,8 +1,9 @@
 #[cfg(test)]
 mod tests {
+
     use super::io::BDFWriter;
     use std::io::{BufWriter, Error, BufReader};
-    use std::fs::File;
+    use std::fs::{File, remove_file};
     use crate::chunks::{HashEntry, DataEntry};
     use crate::io::BDFReader;
 
@@ -11,9 +12,7 @@ mod tests {
 
     #[test]
     fn it_writes_uncompressed() -> Result<(), Error> {
-        let file = File::create("tmp.bdf")?;
-        let f = BufWriter::new(file);
-        let mut writer = BDFWriter::new(f, 2, false);
+        let mut writer = new_writer("tmp1.bdf", 2, false)?;
 
         writer.add_lookup_entry(HashEntry::new(BAR.to_string(), 5))?;
         writer.add_lookup_entry(HashEntry::new(FOO.to_string(), 4))?;
@@ -30,15 +29,14 @@ mod tests {
 
         writer.flush()?;
         writer.flush_writer()?;
+        remove_file("tmp1.bdf")?;
 
         Ok(())
     }
 
     #[test]
     fn it_writes_compressed() -> Result<(), Error> {
-        let file = File::create("tmp-compressed.bdf")?;
-        let f = BufWriter::new(file);
-        let mut writer = BDFWriter::new(f, 2, true);
+        let mut writer = new_writer("tmp2.bdf", 2, true)?;
 
         writer.add_lookup_entry(HashEntry::new(FOO.to_string(), 4))?;
         writer.add_lookup_entry(HashEntry::new(BAR.to_string(), 5))?;
@@ -56,43 +54,43 @@ mod tests {
         writer.flush()?;
         writer.flush_writer()?;
 
+        remove_file("tmp2.bdf")?;
+
         Ok(())
     }
 
     #[test]
     fn it_reads() -> Result<(), Error> {
-        create_simple_file(false)?;
-        let file = File::open("tmp2.bdf")?;
-        let f = BufReader::new(file);
-        let mut reader = BDFReader::new(f);
+        create_simple_file("tmp3.bdf", false)?;
+        let mut reader = new_reader("tmp3.bdf")?;
         reader.read_metadata()?;
         let lookup_table = &reader.read_lookup_table()?.clone();
         let mut next_chunk = reader.next_chunk()?;
         let data_entries = next_chunk.data_entries(lookup_table)?;
         assert_eq!(data_entries[0].plain, "lol".to_string());
 
+        remove_file("tmp3.bdf")?;
+
         Ok(())
     }
 
     #[test]
     fn it_reads_compressed() -> Result<(), Error> {
-        create_simple_file(true)?;
-        let file = File::open("tmp2.bdf")?;
-        let f = BufReader::new(file);
-        let mut reader = BDFReader::new(f);
+        create_simple_file("tmp4.bdf", true)?;
+        let mut reader = new_reader("tmp4.bdf")?;
         reader.read_metadata()?;
         let lookup_table = &reader.read_lookup_table()?.clone();
         let mut next_chunk = reader.next_chunk()?;
         let data_entries = next_chunk.data_entries(lookup_table)?;
         assert_eq!(data_entries[0].plain, "lol".to_string());
 
+        remove_file("tmp4.bdf")?;
+
         Ok(())
     }
 
-    fn create_simple_file(compressed: bool) -> Result<(), Error>{
-        let file = File::create("tmp2.bdf")?;
-        let f = BufWriter::new(file);
-        let mut writer = BDFWriter::new(f, 1, compressed);
+    fn create_simple_file(name: &str, compressed: bool) -> Result<(), Error>{
+        let mut writer = new_writer(name, 1, compressed)?;
 
         writer.add_lookup_entry(HashEntry::new(FOO.to_string(), 4))?;
         let mut entry_1 = DataEntry::new("lol".to_string());
@@ -104,6 +102,20 @@ mod tests {
 
         Ok(())
     }
+
+    fn new_reader(file_name: &str) -> Result<BDFReader, Error> {
+        let file = File::open(file_name)?;
+        let f = BufReader::new(file);
+
+        Ok(BDFReader::new(f))
+    }
+
+    fn new_writer(file_name: &str, entries: u64, compress: bool) -> Result<BDFWriter, Error> {
+        let file = File::create(file_name)?;
+        let f = BufWriter::new(file);
+
+        Ok(BDFWriter::new(f, entries, compress))
+    }
 }
 
 pub mod chunks;