diff --git a/CHANGELOG.md b/CHANGELOG.md
index edfd1d35..5d5ed66b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## Version [v0.8.9] - 2024-10-15
+
+### Changed
+
+- Change `test_ambiguities` to only return ambiguities that happen in the target package. ([#309])
+
+
 ## Version [v0.8.8] - 2024-10-10
 
 ### Changed
@@ -235,6 +242,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [v0.8.6]: https://github.com/JuliaTesting/Aqua.jl/releases/tag/v0.8.6
 [v0.8.7]: https://github.com/JuliaTesting/Aqua.jl/releases/tag/v0.8.7
 [v0.8.8]: https://github.com/JuliaTesting/Aqua.jl/releases/tag/v0.8.8
+[v0.8.9]: https://github.com/JuliaTesting/Aqua.jl/releases/tag/v0.8.9
 [#93]: https://github.com/JuliaTesting/Aqua.jl/issues/93
 [#103]: https://github.com/JuliaTesting/Aqua.jl/issues/103
 [#113]: https://github.com/JuliaTesting/Aqua.jl/issues/113
@@ -283,3 +291,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#287]: https://github.com/JuliaTesting/Aqua.jl/issues/287
 [#288]: https://github.com/JuliaTesting/Aqua.jl/issues/288
 [#297]: https://github.com/JuliaTesting/Aqua.jl/issues/297
+[#309]: https://github.com/JuliaTesting/Aqua.jl/issues/309
diff --git a/Project.toml b/Project.toml
index 62d91cc4..69e7850a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Aqua"
 uuid = "4c88cf16-eb10-579e-8560-4a9242c79595"
 authors = ["Takafumi Arakaki <aka.tkf@gmail.com> and contributors"]
-version = "0.8.8"
+version = "0.8.9"
 
 [deps]
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
diff --git a/src/Aqua.jl b/src/Aqua.jl
index 50f6b532..bc4f00df 100644
--- a/src/Aqua.jl
+++ b/src/Aqua.jl
@@ -29,7 +29,7 @@ include("persistent_tasks.jl")
 
 Run the following tests:
 
-* [`test_ambiguities([testtarget, Base, Core])`](@ref test_ambiguities)
+* [`test_ambiguities([testtarget])`](@ref test_ambiguities)
 * [`test_unbound_args(testtarget)`](@ref test_unbound_args)
 * [`test_undefined_exports(testtarget)`](@ref test_undefined_exports)
 * [`test_project_extras(testtarget)`](@ref test_project_extras)
@@ -66,7 +66,7 @@ function test_all(
 )
     @testset "Method ambiguity" begin
         if ambiguities !== false
-            test_ambiguities([testtarget, Base, Core]; askwargs(ambiguities)...)
+            test_ambiguities([testtarget]; askwargs(ambiguities)...)
         end
     end
     @testset "Unbound type parameters" begin