diff --git a/configuration.go b/configuration.go
index b05a18a..06fc0fb 100644
--- a/configuration.go
+++ b/configuration.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"bufio"
+	"errors"
 	"log"
 	"os"
 	"strconv"
@@ -74,7 +75,7 @@ func (conf *Configuration) StoreConfiguration(path string) (err error) {
 func (conf *Configuration) AddProcess(process string, configPath string) error {
 	for _, v := range conf.Processes {
 		if v == process {
-			return ErrIsOnList
+			return errors.New("process is already on list")
 		}
 	}
 
@@ -93,5 +94,5 @@ func (conf *Configuration) RemoveProcess(process string, configPath string) erro
 		}
 	}
 
-	return ErrNotFound
+	return errors.New("process is not on list")
 }
diff --git a/errors.go b/errors.go
deleted file mode 100644
index 50bc8c4..0000000
--- a/errors.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package main
-
-import "errors"
-
-// ErrNotFound occurs when a process is not presented in a list
-var ErrNotFound = errors.New("process is not on list")
-
-// ErrIsOnList occurs when a process is already presented in a list
-var ErrIsOnList = errors.New("process is already on list")