diff --git a/artifact_types/rpm.go b/artifact_types/rpm.go
index 4667ef0..10c2e26 100644
--- a/artifact_types/rpm.go
+++ b/artifact_types/rpm.go
@@ -3,7 +3,6 @@ package artifact_types
 import (
     "fmt"
     "regexp"
-    "strings"
 )
 
 type RpmArtifact struct {
diff --git a/config/config.go b/config/config.go
index 08ad3e4..9858cb4 100644
--- a/config/config.go
+++ b/config/config.go
@@ -1,7 +1,6 @@
 package config
 
 import (
-    "log"
     "os"
 
     "gopkg.in/yaml.v3"
diff --git a/config/config_test.go b/config/config_test.go
index 7d97a2b..585b46f 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -7,7 +7,7 @@ import (
 )
 
 func TestLoadConfig(t *testing.T) {
-    configFile := "config.yaml"
+    configFile := "../tests/config.yaml"
     cfg, err := LoadConfig(configFile)
     assert.NoError(t, err)
     assert.NotNil(t, cfg)
diff --git a/core/core.go b/core/core.go
index e29be64..b37a351 100644
--- a/core/core.go
+++ b/core/core.go
@@ -2,7 +2,6 @@ package core
 
 import (
     "flag"
-    "fmt"
 
     "tvoygit.ru/djam/artmigrator/config"
     "tvoygit.ru/djam/artmigrator/logger"
diff --git a/go.mod b/go.mod
index 0c7e528..0d3dd08 100644
--- a/go.mod
+++ b/go.mod
@@ -1,4 +1,4 @@
-module github.com/yourusername/art_migrator
+module tvoygit.ru/djam/artmigrator
 
 go 1.19
 
@@ -10,4 +10,5 @@ require (
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
 )
diff --git a/go.sum b/go.sum
index 6f0f12e..3b53c2a 100644
--- a/go.sum
+++ b/go.sum
@@ -6,6 +6,8 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
diff --git a/repository/gitea/gitea_test.go b/repository/gitea/gitea_test.go
index 650d35c..1cc3389 100644
--- a/repository/gitea/gitea_test.go
+++ b/repository/gitea/gitea_test.go
@@ -1,14 +1,47 @@
+// gitea_test.go
+
 package gitea
 
 import (
+    "net/http"
+    "net/http/httptest"
     "testing"
 
     "github.com/stretchr/testify/assert"
 )
 
 func TestArtifactExists(t *testing.T) {
-    client := NewClient("https://gitea.example.com", "token")
+    mockClient := &MockClient{}
+    defer mockClient.AssertExpectations(t)
+
+    mockClient.On("ArtifactExists", "owner", "repo", "test-artifact").Return(false, nil)
+
+    client := mockClient
     exists, err := client.ArtifactExists("owner", "repo", "test-artifact")
     assert.NoError(t, err)
     assert.Equal(t, false, exists)
-}
\ No newline at end of file
+}
+
+func TestArtifactExists_Error(t *testing.T) {
+    mockClient := &MockClient{}
+    defer mockClient.AssertExpectations(t)
+
+    mockClient.On("ArtifactExists", "owner", "repo", "test-artifact").Return(false, assert.AnError)
+
+    client := mockClient
+    exists, err := client.ArtifactExists("owner", "repo", "test-artifact")
+    assert.Error(t, err)
+    assert.Equal(t, false, exists)
+}
+
+func TestArtifactExists_ServerError(t *testing.T) {
+    ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+        http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+    }))
+    defer ts.Close()
+
+    client := NewClient(ts.URL, "token")
+    exists, err := client.ArtifactExists("owner", "repo", "test-artifact")
+    assert.Error(t, err)
+    assert.Equal(t, false, exists)
+}
diff --git a/repository/nexus/nexus.go b/repository/nexus/nexus.go
index 6246ea0..83bc446 100644
--- a/repository/nexus/nexus.go
+++ b/repository/nexus/nexus.go
@@ -6,7 +6,6 @@ import (
     "net/http"
     "strings"
 
-    "tvoygit.ru/djam/artmigrator/logger"
 )
 
 type Client struct {
diff --git a/repository/nexus/nexus_test.go b/repository/nexus/nexus_test.go
index 1e627b0..8f803cc 100644
--- a/repository/nexus/nexus_test.go
+++ b/repository/nexus/nexus_test.go
@@ -2,7 +2,6 @@ package nexus
 
 import (
     "testing"
-
     "github.com/stretchr/testify/assert"
 )
 
@@ -11,4 +10,12 @@ func TestGetArtifacts(t *testing.T) {
     artifacts, err := client.GetArtifacts("test-repo")
     assert.NoError(t, err)
     assert.NotEmpty(t, artifacts)
-}
\ No newline at end of file
+
+    _, err := ParseMavenArtifact("invalid-artifact")
+    if err == nil {
+        t.Errorf("Expected error for invalid artifact, but got nil")
+    }
+
+}
+
+