diff --git a/test/TM1.jl b/test/TM1.jl
index 12465b00..900cf81e 100644
--- a/test/TM1.jl
+++ b/test/TM1.jl
@@ -435,11 +435,19 @@ end
     @testset "Display" begin
         tm = TaylorModel1(2, x1, ii1)
         use_show_default(true)
-        @test string(exp(tm)) == "TaylorModel1{Interval{Float64},Float64}" *
-            "(Taylor1{Interval{Float64}}(Interval{Float64}" *
-            "[Interval(2.718281828459045, 2.7182818284590455), Interval(2.718281828459045, 2.7182818284590455), " *
-            "Interval(1.3591409142295225, 1.3591409142295228)], 2), Interval(-0.05020487208677604, 0.06448109909211741), " *
-            "Interval(1.0, 1.0), Interval(0.5, 1.5))"
+        if VERSION < v"1.6"
+            @test string(exp(tm)) == "TaylorModel1{Interval{Float64},Float64}" *
+                "(Taylor1{Interval{Float64}}(Interval{Float64}" *
+                "[Interval(2.718281828459045, 2.7182818284590455), Interval(2.718281828459045, 2.7182818284590455), " *
+                "Interval(1.3591409142295225, 1.3591409142295228)], 2), Interval(-0.05020487208677604, 0.06448109909211741), " *
+                "Interval(1.0, 1.0), Interval(0.5, 1.5))"
+        else
+            @test string(exp(tm)) == "TaylorModel1{Interval{Float64}, Float64}" *
+                "(Taylor1{Interval{Float64}}(Interval{Float64}" *
+                "[Interval(2.718281828459045, 2.7182818284590455), Interval(2.718281828459045, 2.7182818284590455), " *
+                "Interval(1.3591409142295225, 1.3591409142295228)], 2), Interval(-0.05020487208677604, 0.06448109909211741), " *
+                "Interval(1.0, 1.0), Interval(0.5, 1.5))"
+        end
         use_show_default(false)
         @test string(tm^3) == " Interval(1.0, 1.0) + Interval(3.0, 3.0) t + " *
             "Interval(3.0, 3.0) t² + Interval(-0.125, 0.125)"
@@ -447,7 +455,7 @@ end
             "Interval(2.718281828459045, 2.7182818284590455) t + " *
             "Interval(1.3591409142295225, 1.3591409142295228) t² + " *
             "Interval(-0.05020487208677604, 0.06448109909211741)"
-    end
+end
 
     @testset "Tests for bounders" begin
         @testset "Tests for linear dominated bounder" begin
@@ -863,11 +871,19 @@ end
     @testset "Display" begin
         tm = RTaylorModel1(3, x1, ii1)
         use_show_default(true)
-        @test string(exp(tm)) == "RTaylorModel1{Interval{Float64},Float64}" *
-            "(Taylor1{Interval{Float64}}(Interval{Float64}" *
-            "[Interval(2.718281828459045, 2.7182818284590455), Interval(2.718281828459045, 2.7182818284590455), " *
-            "Interval(1.3591409142295225, 1.3591409142295228), Interval(0.45304697140984085, 0.45304697140984096)], 3), " *
-            "Interval(0.10281598943126369, 0.1256036426541982), Interval(1.0, 1.0), Interval(0.5, 1.5))"
+        if VERSION < v"1.6"
+            @test string(exp(tm)) == "RTaylorModel1{Interval{Float64},Float64}" *
+                "(Taylor1{Interval{Float64}}(Interval{Float64}" *
+                "[Interval(2.718281828459045, 2.7182818284590455), Interval(2.718281828459045, 2.7182818284590455), " *
+                "Interval(1.3591409142295225, 1.3591409142295228), Interval(0.45304697140984085, 0.45304697140984096)], 3), " *
+                "Interval(0.10281598943126369, 0.1256036426541982), Interval(1.0, 1.0), Interval(0.5, 1.5))"
+        else
+            @test string(exp(tm)) == "RTaylorModel1{Interval{Float64}, Float64}" *
+                "(Taylor1{Interval{Float64}}(Interval{Float64}" *
+                "[Interval(2.718281828459045, 2.7182818284590455), Interval(2.718281828459045, 2.7182818284590455), " *
+                "Interval(1.3591409142295225, 1.3591409142295228), Interval(0.45304697140984085, 0.45304697140984096)], 3), " *
+                "Interval(0.10281598943126369, 0.1256036426541982), Interval(1.0, 1.0), Interval(0.5, 1.5))"
+        end
         use_show_default(false)
         @test string(tm^3) == " Interval(1.0, 1.0) + Interval(3.0, 3.0) t + " *
             "Interval(3.0, 3.0) t² + Interval(1.0, 1.0) t³ + Interval(0.0, 0.0) t⁴"
diff --git a/test/TMN.jl b/test/TMN.jl
index 7bb77e68..36ac9f13 100644
--- a/test/TMN.jl
+++ b/test/TMN.jl
@@ -355,17 +355,31 @@ set_variables(Interval{Float64}, [:x, :y], order=_order_max)
         xm = TaylorModelN(1, _order, b1, ib1)
         ym = TaylorModelN(2, _order, b1, ib1)
         use_show_default(true)
-        @test string(xm+ym) == "TaylorModelN{2,Interval{Float64},Float64}" *
-            "(TaylorN{Interval{Float64}}" *
-            "(HomogeneousPolynomial{Interval{Float64}}" *
-            "[HomogeneousPolynomial{Interval{Float64}}" *
-            "(Interval{Float64}[Interval(1.0, 1.0)], 0), " *
-            "HomogeneousPolynomial{Interval{Float64}}" *
-            "(Interval{Float64}[Interval(1.0, 1.0), Interval(1.0, 1.0)], 1), " *
-            "HomogeneousPolynomial{Interval{Float64}}" *
-            "(Interval{Float64}[Interval(0.0, 0.0), Interval(0.0, 0.0), " *
-            "Interval(0.0, 0.0)], 2)], 2), Interval(0.0, 0.0), IntervalBox(Interval(0.0, 0.0), " *
-            "Interval(1.0, 1.0)), IntervalBox(Interval(-0.5, 0.5), Interval(0.5, 1.5)))"
+        if VERSION < v"1.6"
+            @test string(xm+ym) == "TaylorModelN{2,Interval{Float64},Float64}" *
+                "(TaylorN{Interval{Float64}}" *
+                "(HomogeneousPolynomial{Interval{Float64}}" *
+                "[HomogeneousPolynomial{Interval{Float64}}" *
+                "(Interval{Float64}[Interval(1.0, 1.0)], 0), " *
+                "HomogeneousPolynomial{Interval{Float64}}" *
+                "(Interval{Float64}[Interval(1.0, 1.0), Interval(1.0, 1.0)], 1), " *
+                "HomogeneousPolynomial{Interval{Float64}}" *
+                "(Interval{Float64}[Interval(0.0, 0.0), Interval(0.0, 0.0), " *
+                "Interval(0.0, 0.0)], 2)], 2), Interval(0.0, 0.0), IntervalBox(Interval(0.0, 0.0), " *
+                "Interval(1.0, 1.0)), IntervalBox(Interval(-0.5, 0.5), Interval(0.5, 1.5)))"
+        else
+            @test string(xm+ym) == "TaylorModelN{2, Interval{Float64}, Float64}" *
+                "(TaylorN{Interval{Float64}}" *
+                "(HomogeneousPolynomial{Interval{Float64}}" *
+                "[HomogeneousPolynomial{Interval{Float64}}" *
+                "(Interval{Float64}[Interval(1.0, 1.0)], 0), " *
+                "HomogeneousPolynomial{Interval{Float64}}" *
+                "(Interval{Float64}[Interval(1.0, 1.0), Interval(1.0, 1.0)], 1), " *
+                "HomogeneousPolynomial{Interval{Float64}}" *
+                "(Interval{Float64}[Interval(0.0, 0.0), Interval(0.0, 0.0), " *
+                "Interval(0.0, 0.0)], 2)], 2), Interval(0.0, 0.0), IntervalBox(Interval(0.0, 0.0), " *
+                "Interval(1.0, 1.0)), IntervalBox(Interval(-0.5, 0.5), Interval(0.5, 1.5)))"
+        end
         use_show_default(false)
         @test string((xm+ym)^2) == " Interval(1.0, 1.0) + Interval(2.0, 2.0) x + " *
             "Interval(2.0, 2.0) y + Interval(1.0, 1.0) x² + Interval(2.0, 2.0) x y + " *