diff --git a/src/routes/template.spec.ts b/src/routes/template.spec.ts
index 7f07d1d..95141af 100644
--- a/src/routes/template.spec.ts
+++ b/src/routes/template.spec.ts
@@ -5,7 +5,6 @@ import TemplateMeasurementModel from '../models/measurement_template';
 import TestHelper from "../test/helper";
 
 // TODO: do not allow usage of old templates for new samples
-// TODO: template parameters are not allowed to be condition_template
 
 describe('/template', () => {
   let server;
@@ -218,6 +217,16 @@ describe('/template', () => {
           done();
         });
       });
+      it('rejects `condition_template` as parameter name', done => {
+        TestHelper.request(server, done, {
+          method: 'put',
+          url: '/template/condition/200000000000000000000001',
+          auth: {basic: 'admin'},
+          httpStatus: 400,
+          req: {parameters: [{name: 'condition_template', range: {}}]},
+          res: {status: 'Invalid body format', details: '"parameters[0].name" contains an invalid value'}
+        });
+      });
       it('rejects not specified parameters', done => {
         TestHelper.request(server, done, {
           method: 'put',
@@ -227,7 +236,7 @@ describe('/template', () => {
           req: {name: 'heat treatment', parameters: [{name: 'material', range: {xx: 5}}]},
           res: {status: 'Invalid body format', details: '"parameters[0].range.xx" is not allowed'}
         });
-      })
+      });
       it('rejects an invalid id', done => {
         TestHelper.request(server, done, {
           method: 'put',
@@ -327,6 +336,16 @@ describe('/template', () => {
           res: {status: 'Invalid body format', details: '"name" is required'}
         });
       });
+      it('rejects `condition_template` as parameter name', done => {
+        TestHelper.request(server, done, {
+          method: 'post',
+          url: '/template/condition/new',
+          auth: {basic: 'admin'},
+          httpStatus: 400,
+          req: {name: 'heat aging', parameters: [{name: 'condition_template', range: {min: 1}}]},
+          res: {status: 'Invalid body format', details: '"parameters[0].name" contains an invalid value'}
+        });
+      });
       it('rejects a number prefix', done => {
         TestHelper.request(server, done, {
           method: 'post',
diff --git a/src/routes/user.spec.ts b/src/routes/user.spec.ts
index a0d67a5..917b734 100644
--- a/src/routes/user.spec.ts
+++ b/src/routes/user.spec.ts
@@ -2,7 +2,6 @@ import should from 'should/as-function';
 import UserModel from '../models/user';
 import TestHelper from "../test/helper";
 
-// TODO: reject usernames containing admin, etc.
 
 describe('/user', () => {
   let server;
diff --git a/src/routes/validate/template.ts b/src/routes/validate/template.ts
index 111951e..7a63d1d 100644
--- a/src/routes/validate/template.ts
+++ b/src/routes/validate/template.ts
@@ -14,6 +14,7 @@ export default class TemplateValidate {
         Joi.object({
           name: Joi.string()
             .max(128)
+            .invalid('condition_template')
             .required(),
 
           range: Joi.object({