diff --git a/src/morethantext/cache.rs b/src/morethantext/cache.rs
index 1ee76c0..38630c9 100644
--- a/src/morethantext/cache.rs
+++ b/src/morethantext/cache.rs
@@ -312,9 +312,9 @@ mod datatype_file {
         let mut feed = data.iter();
         match DataType::from_bytes(&mut feed) {
             Ok(_) => Err(DBError::new("should have raised an error")),
-            Err(err) => {
-                assert_eq!(err.to_string(), "file corruption");
-                Ok(())
+            Err(err) => match err.code {
+                ErrorCode::CorruptFile => Ok(()),
+                _ => Err(DBError::new("incorrect error code")),
             }
         }
     }
diff --git a/src/morethantext/store.rs b/src/morethantext/store.rs
index 166c51d..421f609 100644
--- a/src/morethantext/store.rs
+++ b/src/morethantext/store.rs
@@ -1,4 +1,4 @@
-use super::{DBError, FileData, SessionData};
+use super::{DBError, ErrorCode, FileData, SessionData};
 use std::{collections::HashMap, slice, str};
 
 #[derive(Clone)]
@@ -46,7 +46,7 @@ impl FileData<Self> for Store {
                 Some(a) => letter = a.clone(),
                 None => {
                     if !name.is_empty() {
-                        return Err(DBError::new(err_msg));
+                        return Err(DBError::from_code(ErrorCode::CorruptFile));
                     }
                     break;
                 }
@@ -55,16 +55,16 @@ impl FileData<Self> for Store {
                 if get_id {
                     let name_holder = match str::from_utf8(&name) {
                         Ok(item) => item,
-                        Err(_) => return Err(DBError::new(err_msg)),
+                        Err(_) => return Err(DBError::from_code(ErrorCode::CorruptFile)),
                     };
                     let id_holder = match str::from_utf8(&id) {
                         Ok(item) => item,
-                        Err(_) => return Err(DBError::new(err_msg)),
+                        Err(_) => return Err(DBError::from_code(ErrorCode::CorruptFile)),
                     };
                     match output.add("database", name_holder, id_holder) {
                         Ok(_) => (),
                         Err(err) => {
-                            let mut error = DBError::new(err_msg);
+                            let mut error = DBError::from_code(ErrorCode::CorruptFile);
                             error.add_source(err);
                             return Err(error);
                         }
@@ -168,29 +168,35 @@ mod file_data {
     }
 
     #[test]
-    fn from_bytes_incomplete_name() {
+    fn from_bytes_incomplete_name() -> Result<(), DBError> {
         let data = "notName".as_bytes();
         let mut feed = data.iter();
         match Store::from_bytes(&mut feed) {
-            Ok(_) => assert!(false, "This should have failed."),
-            Err(err) => assert_eq!(err.to_string(), "file corruption"),
+            Ok(_) => Err(DBError::new("should have produced an errpr")),
+            Err(err) => match err.code {
+                ErrorCode::CorruptFile => Ok(()),
+                _ => Err(DBError::new("incorrect error code")),
+            },
         }
     }
 
     #[test]
-    fn from_bytes_incomplete_id() {
+    fn from_bytes_incomplete_id() -> Result<(), DBError> {
         let mut data = "proper".as_bytes().to_vec();
         data.push(0);
         data.append(&mut "nope".as_bytes().to_vec());
         let mut feed = data.iter();
         match Store::from_bytes(&mut feed) {
-            Ok(_) => assert!(false, "This should have failed."),
-            Err(err) => assert_eq!(err.to_string(), "file corruption"),
+            Ok(_) => Err(DBError::new("should have produced an error")),
+            Err(err) => match err.code {
+                ErrorCode::CorruptFile => Ok(()),
+                _ => Err(DBError::new("incorrect error code")),
+            }
         }
     }
 
     #[test]
-    fn from_bytes_handles_error() {
+    fn from_bytes_handles_error() -> Result<(), DBError> {
         let name = "duplicate";
         let mut data = name.as_bytes().to_vec();
         data.push(0);
@@ -202,17 +208,20 @@ mod file_data {
         data.push(0);
         let mut feed = data.iter();
         match Store::from_bytes(&mut feed) {
-            Ok(_) => assert!(false, "This should have failed."),
-            Err(err) => {
-                assert_eq!(err.to_string(), "file corruption");
-                assert!(
-                    err.source().is_some(),
-                    "Should state file corruption cause."
-                );
-                assert_eq!(
-                    err.source().unwrap().to_string(),
-                    format!("database {} already exists", name)
-                );
+            Ok(_) => Err(DBError::new("should have returned an error")),
+            Err(err) => match err.code {
+                ErrorCode::CorruptFile => {
+                    assert!(
+                        err.source().is_some(),
+                        "Should state file corruption cause."
+                        );
+                    assert_eq!(
+                        err.source().unwrap().to_string(),
+                        format!("database {} already exists", name)
+                        );
+                    Ok(())
+                },
+                _ => Err(DBError::new("incorrect error code")),
             }
         }
     }