diff --git a/Project.toml b/Project.toml
index 9cf73f6d..91ae9fed 100644
--- a/Project.toml
+++ b/Project.toml
@@ -42,8 +42,8 @@ RegularizationTools = "0.6"
 SafeTestsets = "0.1"
 StableRNGs = "1"
 Symbolics = "5.29, 6"
-Test = "1"
-Unitful = "1"
+Test = "1.10"
+Unitful = "1.21.1"
 Zygote = "0.6.70"
 julia = "1.10"
 
diff --git a/src/interpolation_methods.jl b/src/interpolation_methods.jl
index 282a2527..14467311 100644
--- a/src/interpolation_methods.jl
+++ b/src/interpolation_methods.jl
@@ -59,7 +59,7 @@ function _interpolate(A::LinearInterpolation{<:AbstractVector}, t::Number, igues
         idx = firstindex(A.u)
         t1 = t2 = oneunit(eltype(A.t))
         u1 = u2 = oneunit(eltype(A.u))
-        slope = t/t * get_parameters(A, idx)
+        slope = t / t * get_parameters(A, idx)
     else
         idx = get_idx(A, t, iguess)
         t1, t2 = A.t[idx], A.t[idx + 1]
diff --git a/test/interpolation_tests.jl b/test/interpolation_tests.jl
index 45c9ecc2..ab0819d5 100644
--- a/test/interpolation_tests.jl
+++ b/test/interpolation_tests.jl
@@ -108,7 +108,7 @@ end
     @test isnan(A(4.0))
 
     u = [0.0, 1.0, 2.0, NaN]
-    A = LinearInterpolation(u, t; extrapolate = true)
+    A = LinearInterpolation(u, t; extrapolation = ExtrapolationType.Extension)
     @test A(1.0) == 0.0
     @test A(2.0) == 1.0
     @test A(3.0) == 2.0
@@ -146,9 +146,9 @@ end
 
     # NaN time value for Unitful arrays: issue #365
     t = (0:3)u"s" # Unitful quantities  
-    u = [0, -2, -1, -2]u"m"  
-    A = LinearInterpolation(u, t; extrapolate = true)
-    @test isnan(A(NaN*u"s"))
+    u = [0, -2, -1, -2]u"m"
+    A = LinearInterpolation(u, t; extrapolation = ExtrapolationType.Extension)
+    @test isnan(A(NaN * u"s"))
 
     # Nan time value:
     t = 0.0:3  # Floats
diff --git a/test/runtests.jl b/test/runtests.jl
index 774ad497..33b9ab1c 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -7,8 +7,8 @@ using SafeTestsets
 @safetestset "Derivative Tests" include("derivative_tests.jl")
 @safetestset "Integral Tests" include("integral_tests.jl")
 @safetestset "Integral Inverse Tests" include("integral_inverse_tests.jl")
-@safetestset "Extrapolation" include("extrapolation_tests.jl")
+@safetestset "Extrapolation Tests" include("extrapolation_tests.jl")
 @safetestset "Online Tests" include("online_tests.jl")
-@safetestset "Regularization Smoothing" include("regularization.jl")
-@safetestset "Show methods" include("show.jl")
-@safetestset "Zygote support" include("zygote_tests.jl")
+@safetestset "Regularization Smoothing Tests" include("regularization.jl")
+@safetestset "Show methods Tests" include("show.jl")
+@safetestset "Zygote support Tests" include("zygote_tests.jl")