# Chapter 33. Regression Tests
Table of Contents
33.1.1. Running the Tests Against a Temporary Installation
33.1.2. Running the Tests Against an Existing Installation
33.1.3. Additional Test Suites
33.1.5. Custom Server Settings
33.2.1. Error Message Differences
33.2.3. Date and Time Differences
33.2.4. Floating-Point Differences
33.2.5. Row Ordering Differences
33.2.6. Insufficient Stack Depth
33.2.8. Configuration Parameters
33.3. Variant Comparison Files
33.5. Test Coverage Examination
The regression tests are a comprehensive set of tests for the SQL implementation in PostgreSQL. They test standard SQL operations as well as the extended capabilities of PostgreSQL.