diff --git a/templates/go/api_test.go.j2 b/templates/go/api_test.go.j2
new file mode 100644
index 0000000..011f957
--- /dev/null
+++ b/templates/go/api_test.go.j2
@@ -0,0 +1,129 @@
+package {{ package_name }}
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"testing"
+	"time"
+)
+
+const (
+	baseURL   = "{{ mock_server_url }}"
+	testTimeout = 10 * time.Second
+)
+
+{% if security_schemes %}
+{% for scheme_name, scheme in security_schemes.items() %}
+{% if scheme.type == "apiKey" %}
+func get{{ scheme_name|capitalize }}Headers() map[string]string {{
+	return map[string]string{{
+		"{{ scheme.name }}": os.Getenv("API_KEY"),
+	}}
+}}
+
+{% elif scheme.type == "http" and scheme.scheme == "bearer" %}
+func getBearerHeaders() map[string]string {{
+	return map[string]string{{
+		"Authorization": fmt.Sprintf("Bearer %s", os.Getenv("TOKEN")),
+	}}
+}}
+
+{% elif scheme.type == "http" and scheme.scheme == "basic" %}
+func getBasicHeaders(username, password string) map[string]string {{
+	auth := username + ":" + password
+	encoded := base64.StdEncoding.EncodeToString([]byte(auth))
+	return map[string]string{{
+		"Authorization": "Basic " + encoded,
+	}}
+}}
+
+{% endif %}
+{% endfor %}
+{% endif %}
+
+func contains(slice []int, item int) bool {{
+	for _, s := range slice {{
+		if s == item {{
+			return true
+		}}
+	}}
+	return false
+}}
+
+{% for path, path_endpoints in grouped_endpoints.items() %}
+{% for endpoint in path_endpoints %}
+{% set test_name = (endpoint.method + "_" + path.strip("/").replace("/", "_").replace("{", "").replace("}", "")).title().replace("_", "") %}
+func Test{{ test_name }}(t *testing.T) {{
+	client := &http.Client{{Timeout: testTimeout}}
+	url := baseURL + "{{ path }}"
+	
+	{% for param in endpoint.parameters %}
+	{% if param.in == "path" %}
+	url = strings.Replace(url, "{+{{ param.name }}}", "{{ param.name }}", 1)
+	{% endif %}
+	{% endfor %}
+	
+	{% if endpoint.method in ["post", "put", "patch"] %}
+	body := `{{`{}`}}`
+	req, err := http.NewRequest("{{ endpoint.method.upper() }}", url, strings.NewReader(body))
+	{% else %}
+	req, err := http.NewRequest("{{ endpoint.method.upper() }}", url, nil)
+	{% endif %}
+	
+	if err != nil {{
+		t.Fatalf("Failed to create request: %v", err)
+	}}
+	
+	req.Header.Set("Content-Type", "application/json")
+	
+	{% if endpoint.security %}
+	{% set scheme_name = endpoint.security[0].keys()|first %}
+	{% set scheme = security_schemes[scheme_name] %}
+	{% if scheme.type == "apiKey" %}
+	for k, v := range get{{ scheme_name|capitalize }}Headers() {{
+		req.Header.Set(k, v)
+	}}
+	{% elif scheme.type == "http" and scheme.scheme == "bearer" %}
+	for k, v := range getBearerHeaders() {{
+		req.Header.Set(k, v)
+	}}
+	{% endif %}
+	{% endif %}
+	
+	resp, err := client.Do(req)
+	if err != nil {{
+		t.Fatalf("Request failed: %v", err)
+	}}
+	defer resp.Body.Close()
+	
+	if !contains([]int{{200, 201, 204}}, resp.StatusCode) {{
+		t.Errorf("Expected status in [200, 201, 204], got %d", resp.StatusCode)
+	}}
+	
+	if resp.StatusCode == 200 || resp.StatusCode == 201 {{
+		var data interface{}
+		if err := json.NewDecoder(resp.Body).Decode(&data); err != nil {{
+			t.Errorf("Failed to decode response: %v", err)
+		}}
+	}}
+}}
+
+{% endfor %}
+{% endfor %}
+
+func TestAPIHealth(t *testing.T) {{
+	client := &http.Client{{Timeout: testTimeout}}
+	
+	resp, err := client.Get(baseURL + "/health")
+	if err != nil {{
+		t.Fatalf("Health check failed: %v", err)
+	}}
+	defer resp.Body.Close()
+	
+	if resp.StatusCode != 200 {{
+		t.Errorf("Expected status 200, got %d", resp.StatusCode)
+	}}
+}}