Issues

• Avoid failures in isNotInstanceOf assertions for null objects

  assertj/assertj#4411 · Filter by author kqarryzada opened on Sep 21, 2026

• Make assertThat work correctly with Comparable<T> typed variables

  💥 Breaking

  assertj/assertj#4352 · Filter by author scordio opened on Aug 8, 2026 · 4.0.0-M3
  4

• Assertions for enclosing classes

  status: ideal for contribution
  ✨ New Feature

  assertj/assertj#4343 · Filter by author scordio opened on Jul 28, 2026 · 3.x
  2

  

• Test Dashboard

  assertj/assertj#4319 · Filter by author testlens-app opened on Jul 8, 2026

• Check and improve mutation testing coverage

  status: team-only
  🛠️ Task

  assertj/assertj#4311 · Filter by author scordio opened on Jul 1, 2026 · 3.x

• Chaining-friendly assertion that all elements are equal

  status: ideal for contribution
  assertj/assertj#4302 · Filter by author voddan opened on Jun 27, 2026
  4

• Slow performance of contains / containsAll with large HashSet instances

  🐛 Bug

  assertj/assertj#4233 · Filter by author scordio opened on Apr 29, 2026
  1

• Review of unchecked and rawtypes warnings

  ⚡Improvement

  assertj/assertj#4210 · Filter by author scordio opened on Apr 5, 2026 · 4.x

• Improve Groovy compatibility

  language: Groovy
  ⚡Improvement

  assertj/assertj#4206 · Filter by author scordio opened on Mar 31, 2026

• contains / doesNotContain assertions do not follow Set::contains semantics with array elements

  🐛 Bug

  assertj/assertj#4175 · Filter by author scordio opened on Mar 2, 2026 · 3.x
  1

  

• contains assertion fails with empty input if actual is not empty

  🐛 Bug

  assertj/assertj#4159 · Filter by author scordio opened on Feb 21, 2026 · 3.x
  1

  

• Assertions against case insensitive Set don't work

  🐛 Bug

  assertj/assertj#4157 · Filter by author rstoyanchev opened on Feb 20, 2026 · 3.x
  5

  

• AbstractInputStreamAssert#hasSameContentAs(InputStream) converts bytes to String

  assertj/assertj#4146 · Filter by author Marcono1234 opened on Feb 14, 2026
  3

  

• Merge FactoryBasedAssert classes into their respective counterparts

  💥 Breaking

  assertj/assertj#4098 · Filter by author scordio opened on Jan 10, 2026 · 4.x
  

• Partial fix for Eclipse compiler errors and warnings

  3rd-party: Eclipse
  🔙 Backport

  assertj/assertj#4088 · Filter by author scordio opened on Jan 5, 2026 · 3.x
  

• Assignment inconsistency between CharSequenceAssert::new and assertThat(CharSequence)

  theme: generics
  🐛 Bug

  assertj/assertj#4079 · Filter by author scordio opened on Dec 24, 2025 · 3.28.0
  1

  

• DateTimeParseException thrown for java.time.* assertion classes

  assertj/assertj#4021 · Filter by author obecker opened on Nov 20, 2025
  8

• Non-informative output of usingRecursiveComparison().isEqualTo() for structure containing Set as a field

  theme: recursive comparison
  assertj/assertj#4020 · Filter by author sh2ka opened on Nov 20, 2025
  5

• Compilation errors in Eclipse and IntelliJ

  3rd-party: Eclipse
  🛠️ Task

  assertj/assertj#3996 · Filter by author scordio opened on Nov 3, 2025
  1

  

• Evaluate Javadoc executable code snippets

  theme: documentation
  ⚡Improvement

  assertj/assertj#3978 · Filter by author scordio opened on Oct 17, 2025 · 3.x
  1

  

• Evaluate Javadoc migration to Markdown

  theme: documentation
  ⚡Improvement

  assertj/assertj#3977 · Filter by author scordio opened on Oct 17, 2025 · 3.x
  

• Consider adding isNotInThePast and isNotInTheFuture

  assertj/assertj#3975 · Filter by author onacit opened on Oct 16, 2025

• Upgrade to tools.jackson.core:jackson-databind:3.0.0

  status: ideal for contribution
  🛠️ Task

  assertj/assertj#3974 · Filter by author arukiidou opened on Oct 14, 2025
  3

  

• stacktrace assertion

  assertj/assertj#3937 · Filter by author xenoterracide opened on Sep 15, 2025
  2

• given/when/assert

  assertj/assertj#3935 · Filter by author xenoterracide opened on Sep 11, 2025
  2