diff --git a/pkg/config/config_test.go b/pkg/config/config_test.go
new file mode 100644
index 0000000..1f53504
--- /dev/null
+++ b/pkg/config/config_test.go
@@ -0,0 +1,57 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestDefaultConfig(t *testing.T) {
+	cfg := defaultConfig()
+	if cfg.Instance.Name != "microcks" {
+		t.Errorf("Expected default name 'microcks', got %s", cfg.Instance.Name)
+	}
+	if cfg.Instance.Driver != "docker" {
+		t.Errorf("Expected default driver 'docker', got %s", cfg.Instance.Driver)
+	}
+}
+
+func TestSaveAndLoadConfig(t *testing.T) {
+	tmpDir := t.TempDir()
+	cfgPath := filepath.Join(tmpDir, "test-config.yaml")
+
+	original := defaultConfig()
+	original.Instance.Image = "test-image"
+
+	err := SaveConfig(cfgPath, original)
+	if err != nil {
+		t.Fatalf("SaveConfig failed: %v", err)
+	}
+
+	loaded, err := LoadConfig(cfgPath)
+	if err != nil {
+		t.Fatalf("LoadConfig failed: %v", err)
+	}
+
+	if loaded.Instance.Image != "test-image" {
+		t.Errorf("Expected image 'test-image', got %s", loaded.Instance.Image)
+	}
+}
+
+func TestEnsureConfigCreatesFile(t *testing.T) {
+	tmpDir := t.TempDir()
+	cfgPath := filepath.Join(tmpDir, "new-config.yaml")
+
+	cfg, err := EnsureConfig(cfgPath)
+	if err != nil {
+		t.Fatalf("EnsureConfig failed: %v", err)
+	}
+
+	if cfg.Instance.Name != "microcks" {
+		t.Errorf("Expected default name 'microcks', got %s", cfg.Instance.Name)
+	}
+
+	if _, err := os.Stat(cfgPath); os.IsNotExist(err) {
+		t.Errorf("Config file was not created at %s", cfgPath)
+	}
+}