Revert "Merge pull request #14940 from arunagw/hbakhtiyor-test-db-namespaces-ar"

This reverts commit fe9859600824268ff614cb3eb48b62c7165a1fbd, reversing
changes made to add9560643ef79830febf47fa1228752d1df3502.

2 files changed, 6 insertions, 6 deletions

diff --git a/guides/source/contributing_to_ruby_on_rails.md b/guides/source/contributing_to_ruby_on_rails.md
index 342ac7794c..edcf8fa998 100644
--- a/guides/source/contributing_to_ruby_on_rails.md
+++ b/guides/source/contributing_to_ruby_on_rails.md
@@ -265,15 +265,15 @@ This is how you run the Active Record test suite only for SQLite3:
 
 ```bash
 $ cd activerecord
-$ bundle exec rake test:db:sqlite3
+$ bundle exec rake test_sqlite3
 ```
 
 You can now run the tests as you did for `sqlite3`. The tasks are respectively
 
 ```bash
-test:db:mysql
-test:db:mysql2
-test:db:postgresql
+test_mysql
+test_mysql2
+test_postgresql
 ```
 
 Finally,
diff --git a/guides/source/development_dependencies_install.md b/guides/source/development_dependencies_install.md
index ab89bc04a6..b0e070120d 100644
--- a/guides/source/development_dependencies_install.md
+++ b/guides/source/development_dependencies_install.md
@@ -249,7 +249,7 @@ and create the test databases:
 
 ```bash
 $ cd activerecord
-$ bundle exec rake mysql:db:build
+$ bundle exec rake mysql:build_databases
 ```
 
 PostgreSQL's authentication works differently. A simple way to set up the development environment for example is to run with your development account
@@ -267,7 +267,7 @@ and then create the test databases with
 
 ```bash
 $ cd activerecord
-$ bundle exec rake postgresql:db:build
+$ bundle exec rake postgresql:build_databases
 ```
 
 It is possible to build databases for both PostgreSQL and MySQL with