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Go Programming World
Go Programming World
Sep 5, 2025 · Backend Development

How to Test Concurrent Go Code with the New testing/synctest Package

Go’s built‑in concurrency primitives make parallel programming easy, but testing such code is tricky; this article explains the experimental testing/synctest package introduced in Go 1.24/1.25, shows how to rewrite flaky, slow tests into fast, reliable ones, and demonstrates its use with real‑world examples.

ConcurrencyGoGoroutine
0 likes · 15 min read
How to Test Concurrent Go Code with the New testing/synctest Package
BirdNest Tech Talk
BirdNest Tech Talk
Jun 11, 2025 · Backend Development

How Go’s New synctest Feature Eliminates Flaky Concurrent Tests

This article explains why Go tests that rely on goroutine scheduling are flaky, demonstrates the problem with concrete code examples, and shows how the experimental synctest feature provides deterministic execution by controlling synthetic time, coordinating goroutine lifecycles, and offering a reliable Wait primitive.

ConcurrencyGoTesting
0 likes · 12 min read
How Go’s New synctest Feature Eliminates Flaky Concurrent Tests
Radish, Keep Going!
Radish, Keep Going!
Dec 23, 2024 · Backend Development

Speed Up Go Cache Expiration Tests with testing/synctest

This article explains how Go's testing/synctest experiment speeds up cache expiration tests by using a virtual clock and bubble isolation, providing code examples that reduce a five‑second wait to milliseconds while ensuring reliable concurrent test execution.

ConcurrencyGoTesting
0 likes · 7 min read
Speed Up Go Cache Expiration Tests with testing/synctest