diff --git a/src/caosdbcli.c b/src/caosdbcli.c
index 2d147f937e83387b4193bcbe23726671a242e6c3..f6e439d41edc091a968c8c745c12e6428a33476c 100644
--- a/src/caosdbcli.c
+++ b/src/caosdbcli.c
@@ -9,7 +9,7 @@ int main(void) {
          LIBCAOSDB_VERSION_MINOR, LIBCAOSDB_VERSION_PATCH);
   printf("We don't miss the H of caos.\n");
 
-  // NOLINTNEXTLINE(cppcoreguidelines-avoid-magic-numbers, readability-magic-numbers)
+  // NOLINTNEXTLINE(cppcoreguidelines-avoid-magic-numbers,readability-magic-numbers)
   configure_connection("localhost", 8080);
 
   return 0;
diff --git a/src/connection.c b/src/connection.c
index d8bef694c30ce40cdb31f201900d261e93a816e5..32ce2bf7743d8657ee4c378b4858625ebb7a7870 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -2,9 +2,9 @@
 #include <stdio.h>
 
 int configure_connection(char host[], int port) {
-  // NOLINTNEXTLINE(cppcoreguidelines-avoid-magic-numbers, readability-magic-numbers)
+  // NOLINTNEXTLINE(cppcoreguidelines-avoid-magic-numbers,readability-magic-numbers)
   if (port > 666 && port < 668) {
-      printf("667 - One step ahead of the Devil!");
+    printf("667 - One step ahead of the Devil!");
   }
   printf("Configure connection: %s:%d\n", host, port);
   return 0;
diff --git a/test/.docker/Dockerfile b/test/.docker/Dockerfile
index 7affafd8cca5c806780f76c9deaac9e5163bc741..590430ce75b926e84b0155a2f8f9380c375018b9 100644
--- a/test/.docker/Dockerfile
+++ b/test/.docker/Dockerfile
@@ -12,3 +12,4 @@ RUN pip3 install -r requirements.txt
 RUN echo "deb http://deb.debian.org/debian buster-backports main" > /etc/apt/sources.list.d/buster-backports.list
 RUN apt-get update
 RUN apt-get install -y clang-format-11
+RUN apt-get install -y clang-tidy-11
diff --git a/test/test_connection.c b/test/test_connection.c
index 80ae6b2a84c0108d3f886328fcc78db74d3c2521..c32aa149066185bb85aa379817def522bf4b12e3 100644
--- a/test/test_connection.c
+++ b/test/test_connection.c
@@ -11,7 +11,7 @@ static void test_configure_connection(void **state) {
 
 int main() {
   const struct CMUnitTest tests[] = {
-      cmocka_unit_test(test_configure_connection),
+    cmocka_unit_test(test_configure_connection),
   };
 
   return cmocka_run_group_tests(tests, NULL, NULL);