diff --git a/fine_tunes_test.go b/fine_tunes_test.go
new file mode 100644
index 0000000..1f6f967
--- /dev/null
+++ b/fine_tunes_test.go
@@ -0,0 +1,101 @@
+package openai_test
+
+import (
+	. "github.com/sashabaranov/go-openai"
+	"github.com/sashabaranov/go-openai/internal/test"
+
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"testing"
+)
+
+const testFineTuneID = "fine-tune-id"
+
+// TestFineTunes Tests the fine tunes endpoint of the API using the mocked server.
+func TestFineTunes(t *testing.T) {
+	server := test.NewTestServer()
+	server.RegisterHandler(
+		"/v1/fine-tunes",
+		func(w http.ResponseWriter, r *http.Request) {
+			var resBytes []byte
+			if r.Method == http.MethodGet {
+				resBytes, _ = json.Marshal(FineTuneList{})
+			} else {
+				resBytes, _ = json.Marshal(FineTune{})
+			}
+			fmt.Fprintln(w, string(resBytes))
+		},
+	)
+
+	server.RegisterHandler(
+		"/v1/fine-tunes/"+testFineTuneID+"/cancel",
+		func(w http.ResponseWriter, r *http.Request) {
+			resBytes, _ := json.Marshal(FineTune{})
+			fmt.Fprintln(w, string(resBytes))
+		},
+	)
+
+	server.RegisterHandler(
+		"/v1/fine-tunes/"+testFineTuneID,
+		func(w http.ResponseWriter, r *http.Request) {
+			var resBytes []byte
+			if r.Method == http.MethodDelete {
+				resBytes, _ = json.Marshal(FineTuneDeleteResponse{})
+			} else {
+				resBytes, _ = json.Marshal(FineTune{})
+			}
+			fmt.Fprintln(w, string(resBytes))
+		},
+	)
+
+	server.RegisterHandler(
+		"/v1/fine-tunes/"+testFineTuneID+"/events",
+		func(w http.ResponseWriter, r *http.Request) {
+			resBytes, _ := json.Marshal(FineTuneEventList{})
+			fmt.Fprintln(w, string(resBytes))
+		},
+	)
+
+	// create the test server
+	var err error
+	ts := server.OpenAITestServer()
+	ts.Start()
+	defer ts.Close()
+
+	config := DefaultConfig(test.GetTestToken())
+	config.BaseURL = ts.URL + "/v1"
+	client := NewClientWithConfig(config)
+	ctx := context.Background()
+
+	_, err = client.ListFineTunes(ctx)
+	if err != nil {
+		t.Fatalf("ListFineTunes error: %v", err)
+	}
+
+	_, err = client.CreateFineTune(ctx, FineTuneRequest{})
+	if err != nil {
+		t.Fatalf("CreateFineTune error: %v", err)
+	}
+
+	_, err = client.CancelFineTune(ctx, testFineTuneID)
+	if err != nil {
+		t.Fatalf("CancelFineTune error: %v", err)
+	}
+
+	_, err = client.GetFineTune(ctx, testFineTuneID)
+	if err != nil {
+		t.Fatalf("GetFineTune error: %v", err)
+	}
+
+	_, err = client.DeleteFineTune(ctx, testFineTuneID)
+	if err != nil {
+		t.Fatalf("DeleteFineTune error: %v", err)
+	}
+
+	_, err = client.ListFineTuneEvents(ctx, testFineTuneID)
+	if err != nil {
+		t.Fatalf("ListFineTuneEvents error: %v", err)
+	}
+}
diff --git a/models_test.go b/models_test.go
new file mode 100644
index 0000000..c96ece8
--- /dev/null
+++ b/models_test.go
@@ -0,0 +1,39 @@
+package openai_test
+
+import (
+	. "github.com/sashabaranov/go-openai"
+	"github.com/sashabaranov/go-openai/internal/test"
+
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"testing"
+)
+
+// TestListModels Tests the models endpoint of the API using the mocked server.
+func TestListModels(t *testing.T) {
+	server := test.NewTestServer()
+	server.RegisterHandler("/v1/models", handleModelsEndpoint)
+	// create the test server
+	var err error
+	ts := server.OpenAITestServer()
+	ts.Start()
+	defer ts.Close()
+
+	config := DefaultConfig(test.GetTestToken())
+	config.BaseURL = ts.URL + "/v1"
+	client := NewClientWithConfig(config)
+	ctx := context.Background()
+
+	_, err = client.ListModels(ctx)
+	if err != nil {
+		t.Fatalf("ListModels error: %v", err)
+	}
+}
+
+// handleModelsEndpoint Handles the models endpoint by the test server.
+func handleModelsEndpoint(w http.ResponseWriter, r *http.Request) {
+	resBytes, _ := json.Marshal(ModelsList{})
+	fmt.Fprintln(w, string(resBytes))
+}