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LocalStack on

localstack.cloud github.com/localstack/localstack

2026.7.3 as measured in this run

Grade C
high divergence
answers 15.6% of the suite differently from real DynamoDB
99.2% covered · 8 unsupported
Tier 1 · Core 6.5% diverges
100.0% covered
31 of 475 attempted
Tier 2 · Complete 18.1% diverges
96.0% covered 8 unsupported
36 of 191 attempted
Tier 3 · Strict 27.5% diverges
100.0% covered
89 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 2026-08-12 0% 10% 20% divergence - lower is better 23 Mar 25 Apr 24 May 29 May 18 Jun 22 Jun 27 Jun 1 Jul 13 Jul 16 Jul 20 Jul 24 Jul 29 Jul 12 Aug 15.6%
Diverging on 15.6% of the suite as of 12 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 2026-08-12 96% 98% 100% coverage - higher is better 23 Mar 25 Apr 24 May 29 May 18 Jun 22 Jun 27 Jun 1 Jul 13 Jul 16 Jul 20 Jul 24 Jul 29 Jul 12 Aug 99.2%
Implementing 99.2% of the suite as of 12 Aug, as little as 98.8% on 26 May. 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.