diff --git a/tests/config_test.go b/tests/config_test.go
new file mode 100644
index 0000000..93c3dfc
--- /dev/null
+++ b/tests/config_test.go
@@ -0,0 +1,77 @@
+package tests
+
+import (
+	"testing"
+
+	"grain/relay/utils"
+)
+
+func TestConfigValidity(t *testing.T) {
+	config, err := utils.LoadConfig("../config.yml")
+	if err != nil {
+		t.Fatalf("Error loading config: %v", err)
+	}
+
+	// Check MongoDB settings
+	if config.MongoDB.URI == "" {
+		t.Error("MongoDB URI is required")
+	}
+	if config.MongoDB.Database == "" {
+		t.Error("MongoDB database name is required")
+	}
+
+	// Check Server settings
+	if config.Server.Port == "" {
+		t.Error("Server port is required")
+	}
+
+	// Check Rate Limit settings
+	if config.RateLimit.WsLimit == 0 {
+		t.Error("WebSocket limit is required")
+	}
+	if config.RateLimit.WsBurst == 0 {
+		t.Error("WebSocket burst is required")
+	}
+	if config.RateLimit.EventLimit == 0 {
+		t.Error("Event limit is required")
+	}
+	if config.RateLimit.EventBurst == 0 {
+		t.Error("Event burst is required")
+	}
+	if config.RateLimit.ReqLimit == 0 {
+		t.Error("REQ limit is required")
+	}
+	if config.RateLimit.ReqBurst == 0 {
+		t.Error("REQ burst is required")
+	}
+
+	// Check Category Limits
+	if len(config.RateLimit.CategoryLimits) == 0 {
+		t.Log("Warning: No category limits set")
+	}
+
+	// Check Kind Limits
+	if len(config.RateLimit.KindLimits) == 0 {
+		t.Log("Warning: No kind limits set")
+	}
+
+	// Validate individual category limits
+	for category, limits := range config.RateLimit.CategoryLimits {
+		if limits.Limit == 0 {
+			t.Errorf("Limit is required for category: %s", category)
+		}
+		if limits.Burst == 0 {
+			t.Errorf("Burst is required for category: %s", category)
+		}
+	}
+
+	// Validate individual kind limits
+	for _, kindLimit := range config.RateLimit.KindLimits {
+		if kindLimit.Limit == 0 {
+			t.Errorf("Limit is required for kind: %d", kindLimit.Kind)
+		}
+		if kindLimit.Burst == 0 {
+			t.Errorf("Burst is required for kind: %d", kindLimit.Kind)
+		}
+	}
+}
\ No newline at end of file
diff --git a/tests/rateLimits_test.go b/tests/rateLimits_test.go
new file mode 100644
index 0000000..0bd55b3
--- /dev/null
+++ b/tests/rateLimits_test.go
@@ -0,0 +1,108 @@
+package tests
+
+import (
+	"testing"
+
+	"grain/relay/utils"
+
+	"golang.org/x/time/rate"
+)
+
+func TestWebSocketRateLimit(t *testing.T) {
+	rateLimiter := utils.NewRateLimiter(rate.Limit(1), 1, rate.Limit(100), 200, rate.Limit(100), 200)
+
+	// First message should be allowed
+	if allowed, _ := rateLimiter.AllowWs(); !allowed {
+		t.Error("First WebSocket message should be allowed")
+	}
+
+	// Second message should be rate-limited
+	if allowed, msg := rateLimiter.AllowWs(); allowed {
+		t.Error("Second WebSocket message should be rate-limited")
+	} else {
+		expectedMsg := "WebSocket message rate limit exceeded"
+		if msg != expectedMsg {
+			t.Errorf("Expected message: %s, got: %s", expectedMsg, msg)
+		}
+	}
+}
+
+func TestEventRateLimit(t *testing.T) {
+	rateLimiter := utils.NewRateLimiter(rate.Limit(100), 200, rate.Limit(1), 1, rate.Limit(100), 200)
+	rateLimiter.AddKindLimit(1, rate.Limit(1), 1)
+	rateLimiter.AddCategoryLimit("regular", rate.Limit(1), 1)
+
+	// First event should be allowed
+	if allowed, _ := rateLimiter.AllowEvent(1, "regular"); !allowed {
+		t.Error("First event should be allowed")
+	}
+
+	// Second event should be rate-limited
+	if allowed, msg := rateLimiter.AllowEvent(1, "regular"); allowed {
+		t.Error("Second event should be rate-limited")
+	} else {
+		expectedMsg := "Global event rate limit exceeded"
+		if msg != expectedMsg {
+			t.Errorf("Expected message: %s, got: %s", expectedMsg, msg)
+		}
+	}
+}
+
+func TestReqRateLimit(t *testing.T) {
+	rateLimiter := utils.NewRateLimiter(rate.Limit(100), 200, rate.Limit(100), 200, rate.Limit(1), 1)
+
+	// First REQ should be allowed
+	if allowed, _ := rateLimiter.AllowReq(); !allowed {
+		t.Error("First REQ message should be allowed")
+	}
+
+	// Second REQ should be rate-limited
+	if allowed, msg := rateLimiter.AllowReq(); allowed {
+		t.Error("Second REQ message should be rate-limited")
+	} else {
+		expectedMsg := "REQ rate limit exceeded"
+		if msg != expectedMsg {
+			t.Errorf("Expected message: %s, got: %s", expectedMsg, msg)
+		}
+	}
+}
+
+func TestKindRateLimit(t *testing.T) {
+	rateLimiter := utils.NewRateLimiter(rate.Limit(100), 200, rate.Limit(100), 200, rate.Limit(100), 200)
+	rateLimiter.AddKindLimit(1, rate.Limit(1), 1)
+
+	// First event of kind 1 should be allowed
+	if allowed, _ := rateLimiter.AllowEvent(1, "regular"); !allowed {
+		t.Error("First event of kind 1 should be allowed")
+	}
+
+	// Second event of kind 1 should be rate-limited
+	if allowed, msg := rateLimiter.AllowEvent(1, "regular"); allowed {
+		t.Error("Second event of kind 1 should be rate-limited")
+	} else {
+		expectedMsg := "Rate limit exceeded for kind: 1"
+		if msg != expectedMsg {
+			t.Errorf("Expected message: %s, got: %s", expectedMsg, msg)
+		}
+	}
+}
+
+func TestCategoryRateLimit(t *testing.T) {
+	rateLimiter := utils.NewRateLimiter(rate.Limit(100), 200, rate.Limit(100), 200, rate.Limit(100), 200)
+	rateLimiter.AddCategoryLimit("regular", rate.Limit(1), 1)
+
+	// First event in category "regular" should be allowed
+	if allowed, _ := rateLimiter.AllowEvent(1, "regular"); !allowed {
+		t.Error("First event in category 'regular' should be allowed")
+	}
+
+	// Second event in category "regular" should be rate-limited
+	if allowed, msg := rateLimiter.AllowEvent(1, "regular"); allowed {
+		t.Error("Second event in category 'regular' should be rate-limited")
+	} else {
+		expectedMsg := "Rate limit exceeded for category: regular"
+		if msg != expectedMsg {
+			t.Errorf("Expected message: %s, got: %s", expectedMsg, msg)
+		}
+	}
+}