# Test package with dev-ed dependency

**URL:** <https://discourse.julialang.org/t/test-package-with-dev-ed-dependency/135740>\
**Category:** General Usage\
**Tags:** package, testing, pkg, package-manager, package-management\
**Created:** [February 19, 2026, 9:13pm UTC](https://discourse.julialang.org/t/test-package-with-dev-ed-dependency/135740 "2026-02-19T21:13:32Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![nsajko](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nsajko/32/221187_2.png) [@nsajko](https://discourse.julialang.org/u/nsajko)\
**Post date:** [February 19, 2026, 9:13pm UTC](https://discourse.julialang.org/t/test-package-with-dev-ed-dependency/135740/1 "2026-02-19T21:13:32Z")

</div>

Package `P` depends on package `D`. I want to run the test suite of package `P` with a specific version of package `D` in the manifest. To be specific, I have `D` `dev`-ed, I want the `dev`-ed variant to be loaded for the test suite.

Specifically, `P` is CliqueTrees.jl, whose test suite I want to run with the `main` branch of FixedSizeArrays.jl, which is `D`.

However when I run the Pkg.jl `test` command, it says:

> ```none
> (@v1.12) pkg> test CliqueTrees
> Testing CliqueTrees
> Test Could not use exact versions of packages in manifest. Re-resolving dependencies
> 
> ```

Then it proceeds to run the test suite with a released version of FixedSizeArrays.jl, which is not what I want.

This is what happens when I run `test` while not allowing re-resolving:

```none
julia> using Pkg: test

julia> test("CliqueTrees"; allow_reresolve = false)
     Testing CliqueTrees
ERROR: Unsatisfiable requirements detected for package DataStructures [864edb3b]:
 DataStructures [864edb3b] log:
 ├─possible versions are: 0.9.0 - 0.19.3 or uninstalled
 ├─restricted to versions 0.19.3 by an explicit requirement, leaving only versions: 0.19.3
 └─restricted by compatibility requirements with Catlab [134e5e36] to versions: 0.17.0 - 0.18.22 — no versions left
   └─Catlab [134e5e36] log:
     ├─possible versions are: 0.2.1 - 0.17.4 or uninstalled
     ├─restricted to versions * by project [25071fe8], leaving only versions: 0.2.1 - 0.17.4
     │ └─project [25071fe8] log:
     │ ├─possible versions are: 0.0.0 or uninstalled
     │ └─project [25071fe8] is fixed to version 0.0.0
     └─restricted by compatibility requirements with CliqueTrees [60701a23] to versions: 0.16.0 - 0.17.4 or uninstalled, leaving only versions: 0.16.0 - 0.17.4
       └─CliqueTrees [60701a23] log:
         ├─possible versions are: 0.2.0 - 1.13.1 or uninstalled
         └─restricted to versions 1.13.1 by an explicit requirement, leaving only versions: 1.13.1

```

How to run the CliqueTrees.jl test suite with loaded desired version of FixedSizeArrays.jl?

---

<div class="post-metadata">

**Author:** ![favba](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/favba/32/2735_2.png) [@favba](https://discourse.julialang.org/u/favba)\
**Post date:** [February 20, 2026, 12:54am UTC](https://discourse.julialang.org/t/test-package-with-dev-ed-dependency/135740/2 "2026-02-20T00:54:50Z")

</div>

Do you need to use `Pkg.test` explicitly in your actual use case?

Otherwise, you could simply activate your desired environment, with `FixedSizeArrays.jl` dev-ed and `include("~/.julia/Packages/CliqueTrees/WhAtEvEr/test/runtests.jl")` and that would run the tests, wouldn’t it?

You’d also need to add `Tests` to this environment