diff --git a/nixos/tests/mysql-replication.nix b/nixos/tests/mysql-replication.nix
index a68d21c82b4..94532189586 100644
--- a/nixos/tests/mysql-replication.nix
+++ b/nixos/tests/mysql-replication.nix
@@ -12,11 +12,11 @@ in
       {
         services.mysql.enable = true;
         services.mysql.package = pkgs.mysql;
-	services.mysql.replication.role = "master";
-	services.mysql.initialDatabases = [ { name = "testdb"; schema = ./testdb.sql; } ];
-	services.mysql.initialScript = pkgs.writeText "initmysql"
+        services.mysql.replication.role = "master";
+        services.mysql.initialDatabases = [ { name = "testdb"; schema = ./testdb.sql; } ];
+        services.mysql.initialScript = pkgs.writeText "initmysql"
         ''
-	  create user '${replicateUser}'@'%' identified by '${replicatePassword}';
+          create user '${replicateUser}'@'%' identified by '${replicatePassword}';
           grant replication slave on *.* to '${replicateUser}'@'%';
         '';
       };
@@ -26,11 +26,11 @@ in
 
       {
         services.mysql.enable = true;
-	services.mysql.replication.role = "slave";
-	services.mysql.replication.serverId = 2;
-	services.mysql.replication.masterHost = nodes.master.config.networking.hostName;
-	services.mysql.replication.masterUser = replicateUser;
-	services.mysql.replication.masterPassword = replicatePassword;
+        services.mysql.replication.role = "slave";
+        services.mysql.replication.serverId = 2;
+        services.mysql.replication.masterHost = nodes.master.config.networking.hostName;
+        services.mysql.replication.masterUser = replicateUser;
+        services.mysql.replication.masterPassword = replicatePassword;
       };
 
     slave2 =
@@ -38,11 +38,11 @@ in
 
       {
         services.mysql.enable = true;
-	services.mysql.replication.role = "slave";
-	services.mysql.replication.serverId = 3;
-	services.mysql.replication.masterHost = nodes.master.config.networking.hostName;
-	services.mysql.replication.masterUser = replicateUser;
-	services.mysql.replication.masterPassword = replicatePassword;
+        services.mysql.replication.role = "slave";
+        services.mysql.replication.serverId = 3;
+        services.mysql.replication.masterHost = nodes.master.config.networking.hostName;
+        services.mysql.replication.masterUser = replicateUser;
+        services.mysql.replication.masterPassword = replicatePassword;
       };
   };
 
diff --git a/nixos/tests/mysql.nix b/nixos/tests/mysql.nix
index abdd3909221..bceeb8beabc 100644
--- a/nixos/tests/mysql.nix
+++ b/nixos/tests/mysql.nix
@@ -7,8 +7,8 @@
 
       {
         services.mysql.enable = true;
-	services.mysql.replication.role = "master";
-	services.mysql.initialDatabases = [ { name = "testdb"; schema = ./testdb.sql; } ];
+        services.mysql.replication.role = "master";
+        services.mysql.initialDatabases = [ { name = "testdb"; schema = ./testdb.sql; } ];
         services.mysql.package = pkgs.mysql;
       };
   };