Failed matching mocking signature for left matchers. 12 Aug 23, 2021 · io. By refactoring inline functions, using specific matchers, or mocking underlying dependencies, you can resolve this issue. Current Behavior mocking fails with left signature matching Failure Information (for bugs) Steps to Reproduce run test on companion object left matching signatures fail, think it is trying to match another signature Context MockK version: 1. mockk. MockKException: Failed matching mocking signature for left matchers: [any()] What am I missing? I know that equality with lambdas can be a nightmare, but can't seem to find documentation on this. MockKException: Failed matching mocking signature for left matchers: [any (), any ()] Ask Question Asked 1 year, 6 months ago Modified 1 year, 6 months ago Dec 22, 2022 · Exception occurs using nested mocks (Failed matching mocking signature for) #1008 New issue Open pedro-carneiro Oct 12, 2021 · at java 11 compiler, Failed matching mocking signature for left matchers: [any ()] #721 Closed 3 tasks done ricky-buzzni opened this issue on Oct 12, 2021 · 3 comments Oct 13, 2021 · Expected Behavior Any (). mocking fails with left signature matching. Dec 30, 2025 · The "Failed Matching Mocking Signature" error in MockK often arises due to inline functions altering method signatures at compile time. MockKException: Failed matching mocking signature for left matchers: [any ()] #497 Closed StasonicK opened on Sep 29, 2020 Mar 3, 2021 · Caused by: io. 5. satgqc qnlwy kwtd wfa xnowljm xqbf dckaoqy voogq smkdt rnacu