diff --git a/test/Project.toml b/test/Project.toml
index 7d70fe1..260aa24 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -3,7 +3,6 @@ Cbc = "9961bab8-2fa3-5c5a-9d89-47fab24efd76"
 DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
 Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"
 GZip = "92fee26a-97fe-5a0c-ad85-20a5f3185b63"
-Gurobi = "2e9cd046-0924-5485-92f1-d5272153d98b"
 JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 JuMP = "4076af6c-e467-56ae-b986-b466b2749572"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
diff --git a/test/model/formulations_test.jl b/test/model/formulations_test.jl
index 47fb373..4080004 100644
--- a/test/model/formulations_test.jl
+++ b/test/model/formulations_test.jl
@@ -17,11 +17,7 @@ import UnitCommitment:
     XavQiuWanThi2019,
     WanHob2016
 
-if ENABLE_LARGE_TESTS
-    using Gurobi
-end
-
-function _small_test(
+function _test(
     formulation::Formulation;
     instances::Array{String} = ["test/case14"],
     optimizer = optimizer_with_attributes(Cbc.Optimizer, "logLevel" => 0),
@@ -42,32 +38,6 @@ function _small_test(
     end
 end
 
-function _large_test(formulation::Formulation)::Nothing
-    instances = ["pglib-uc/ca/Scenario400_reserves_1"]
-    for instance in instances
-        instance = UnitCommitment.read_benchmark(instance)
-        model = UnitCommitment.build_model(
-            instance = instance,
-            formulation = formulation,
-            optimizer = Gurobi.Optimizer,
-        )
-        UnitCommitment.optimize!(
-            model,
-            XavQiuWanThi2019.Method(two_phase_gap = false, gap_limit = 0.1),
-        )
-        solution = UnitCommitment.solution(model)
-        @test UnitCommitment.validate(instance, solution)
-    end
-    return
-end
-
-function _test(formulation::Formulation)::Nothing
-    _small_test(formulation)
-    if ENABLE_LARGE_TESTS
-        _large_test(formulation)
-    end
-end
-
 @testset "formulations" begin
     _test(Formulation())
     _test(Formulation(ramping = ArrCon2000.Ramping()))
@@ -83,7 +53,7 @@ end
     _test(Formulation(pwl_costs = Gar1962.PwlCosts()))
     _test(Formulation(pwl_costs = CarArr2006.PwlCosts()))
     _test(Formulation(pwl_costs = KnuOstWat2018.PwlCosts()))
-    _small_test(
+    _test(
         Formulation(ramping = WanHob2016.Ramping()),
         instances = ["test/case14-flex"],
     )
diff --git a/test/runtests.jl b/test/runtests.jl
index 56cade9..d00f9ac 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -8,8 +8,6 @@ using UnitCommitment
 push!(Base.LOAD_PATH, @__DIR__)
 UnitCommitment._setup_logger(level = Base.CoreLogging.Error)
 
-const ENABLE_LARGE_TESTS = ("UCJL_LARGE_TESTS" in keys(ENV))
-
 @testset "UnitCommitment" begin
     include("usage.jl")
     @testset "import" begin