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LocalStack on

localstack.cloud github.com/localstack/localstack

2026.8.0 as measured in this run

Grade B
low divergence · coverage lowers this row to B
answers 3.5% of the suite differently from real DynamoDB
95.2% covered · 51 unsupported
Tier 1 · Core 2.9% diverges
100.0% covered
14 of 489 attempted
Tier 2 · Complete 7.9% diverges
84.6% covered 35 unsupported
18 of 192 attempted
Tier 3 · Strict 1.5% diverges
95.3% covered 16 unsupported
5 of 324 attempted

How it got here

LocalStack's history up to this run, ending on the figures above. Both are plotted because neither reads correctly alone: divergence falls when a target stops attempting an operation it used to get wrong, so a fall in the first plot is only an improvement if the second one holds. The target's own page carries the full history.

Divergence

LocalStack divergence up to 2026-08-30 0% 10% 20% divergence - lower is better 25 Apr 25 May 16 Jun 22 Jun 29 Jun 6 Jul 16 Jul 21 Jul 28 Jul 12 Aug 18 Aug 30 Aug 3.5%
Diverging on 3.5% of the suite as of 30 Aug, at worst 16.5% on 30 Jun. Lower is better, so a falling line is a target getting closer to real DynamoDB.

Coverage

LocalStack coverage up to 2026-08-30 94% 97% 100% coverage - higher is better 25 Apr 25 May 16 Jun 22 Jun 29 Jun 6 Jul 16 Jul 21 Jul 28 Jul 12 Aug 18 Aug 30 Aug 95.2%
Implementing 95.2% of the suite as of 30 Aug, as little as 95.1% on 21 Aug. Higher is better. This is the share of the suite's tests a target implements at all. A fail becoming a skip leaves both numerators over the same fixed denominator, so a fall here is matched point for point by a fall in divergence: withdrawal costs exactly as much coverage as it gains divergence.

Where it fell short on this date

The tests this run recorded as failing, each linked to its source at the commit that measured it. For the current picture, see this target's latest results, or every target in this run.