diff --git a/lms/lms/doctype/lms_certificate/lms_certificate.py b/lms/lms/doctype/lms_certificate/lms_certificate.py
index 1ffe1f10..f7e1193e 100644
--- a/lms/lms/doctype/lms_certificate/lms_certificate.py
+++ b/lms/lms/doctype/lms_certificate/lms_certificate.py
@@ -14,7 +14,8 @@ class LMSCertificate(Document):
 		self.validate_duplicate_certificate()
 
 	def after_insert(self):
-		self.send_mail()
+		if not frappe.flags.in_test:
+			self.send_mail()
 
 	def send_mail(self):
 		subject = _("Congratulations on getting certified!")