diff --git a/test/runtests.jl b/test/runtests.jl
index 6370c6b7..71aca29f 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -2,6 +2,8 @@
 using LinearAlgebra, SparseArrays, Random, Test
 # jso
 using CUTEst, NLPModels, NLPModelsTest
+# external
+using Quadmath
 
 set_mastsif()
 @test ispath(ENV["MASTSIF"])