diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index ac4a0084..dcec41d6 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - "1.0"  # LTS
+          - "1.6"  # LTS
           - "1"    # Latest Release
         os:
           - ubuntu-latest
@@ -30,11 +30,6 @@ jobs:
             arch: x86
           - os: windows-latest
             arch: x86
-        include:
-          # Add a 1.5 job because that's what Invenia actually uses
-          - os: ubuntu-latest
-            version: 1.5
-            arch: x64
     steps:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1
diff --git a/Project.toml b/Project.toml
index 4b976c86..2d6b35de 100644
--- a/Project.toml
+++ b/Project.toml
@@ -12,11 +12,11 @@ Serialization = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 TimeZones = "f269a46b-ccf7-5d73-abea-4c690281aa53"
 
 [compat]
-Documenter = "0.23, 0.24"
+Documenter = "0.23, 0.24, 0.25, 0.26, 0.27"
 Infinity = "0.2.3"
 RecipesBase = "0.7, 0.8, 1"
-TimeZones = "0.7, 0.8, 0.9, 0.10, 0.11, 1"
-julia = "1"
+TimeZones = "1.7"
+julia = "1.6"
 
 [extras]
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
diff --git a/src/Intervals.jl b/src/Intervals.jl
index 0a66b81a..d0fc0d67 100644
--- a/src/Intervals.jl
+++ b/src/Intervals.jl
@@ -10,12 +10,6 @@ using Dates: AbstractDateTime, value, coarserperiod
 
 import Base: ⊆, ⊇, ⊈, ⊉, union, union!, merge
 
-# Extend `Base.isdisjoint` when it exists
-# https://github.com/JuliaLang/julia/pull/34427
-if VERSION >= v"1.5.0-DEV.124"
-    import Base: isdisjoint
-end
-
 abstract type Bound end
 abstract type Bounded <: Bound end
 struct Closed <: Bounded end
diff --git a/src/compat.jl b/src/compat.jl
index f85e5c6d..f0939a0a 100644
--- a/src/compat.jl
+++ b/src/compat.jl
@@ -21,11 +21,3 @@ function Serialization.deserialize(s::AbstractSerializer, ::Type{AnchoredInterva
 
     return AnchoredInterval{P,T,L,R}(anchor)
 end
-
-# Works around an issue where a `StepRangeLen` tries to convert the step to an
-# `AbstractInterval`.
-# Issue introduced in https://github.com/JuliaLang/julia/pull/23194 (a698230daf6)
-# and fixed in https://github.com/JuliaLang/julia/pull/34412 (fca037a162)
-if v"0.7.0-DEV.1399" <= VERSION < v"1.5.0-DEV.127"
-    Base.step(r::StepRangeLen{<:AbstractInterval}) = r.step
-end
diff --git a/src/interval.jl b/src/interval.jl
index 73f6d3f4..a674c2e6 100644
--- a/src/interval.jl
+++ b/src/interval.jl
@@ -365,7 +365,7 @@ function Base.issubset(a::AbstractInterval, b::AbstractInterval)
     return LeftEndpoint(a) ≥ LeftEndpoint(b) && RightEndpoint(a) ≤ RightEndpoint(b)
 end
 
-function isdisjoint(a::AbstractInterval, b::AbstractInterval)
+function Base.isdisjoint(a::AbstractInterval, b::AbstractInterval)
     return RightEndpoint(a) < LeftEndpoint(b) || LeftEndpoint(a) > RightEndpoint(b)
 end
 
diff --git a/test/anchoredinterval.jl b/test/anchoredinterval.jl
index 6a21a2ff..90858815 100644
--- a/test/anchoredinterval.jl
+++ b/test/anchoredinterval.jl
@@ -245,38 +245,35 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
         # When dropping VERSION < v"1.2.0-DEV.223" (https://github.com/JuliaLang/julia/pull/30817)
         # - `repr(Period(...))`can be converted to hardcode strings
 
-        where_lr = "where R<:$Bounded where L<:$Bounded"
-        where_tlr = "$where_lr where T"
+        where_lr = "where {L<:$Bounded, R<:$Bounded}"
+        where_tlr = "where {T, L<:$Bounded, R<:$Bounded}"
 
-        where_lr2 = "where {L<:$Bounded, R<:$Bounded}"
-        where_tlr2 = "where {T, L<:$Bounded, R<:$Bounded}"
-
-        if VERSION >= v"1.6.0"
+        if VERSION >= v"1.7.0"
             @test sprint(show, AnchoredInterval{Hour(-1)}) ==
-                "HourEnding{T, L, R} $where_tlr2"
+                "HourEnding"
             @test sprint(show, AnchoredInterval{Hour(1)}) ==
-                "HourBeginning{T, L, R} $where_tlr2"
+                "HourBeginning"
             @test sprint(show, AnchoredInterval{Day(-1)}) ==
-                "AnchoredInterval{$(repr(Day(-1))), T, L, R} $where_tlr2"
+                "AnchoredInterval{$(repr(Day(-1)))}"
             @test sprint(show, AnchoredInterval{Day(1)}) ==
-                "AnchoredInterval{$(repr(Day(1))), T, L, R} $where_tlr2"
+                "AnchoredInterval{$(repr(Day(1)))}"
             @test sprint(show, AnchoredInterval{Day(-1), DateTime}) ==
-                "AnchoredInterval{$(repr(Day(-1))), DateTime, L, R} $where_lr2"
+                "AnchoredInterval{$(repr(Day(-1))), DateTime}"
             @test sprint(show, AnchoredInterval{Day(1), DateTime}) ==
-                "AnchoredInterval{$(repr(Day(1))), DateTime, L, R} $where_lr2"
+                "AnchoredInterval{$(repr(Day(1))), DateTime}"
         else
             @test sprint(show, AnchoredInterval{Hour(-1)}) ==
-                "AnchoredInterval{$(repr(Hour(-1))),T,L,R} $where_tlr"
+                "HourEnding{T, L, R} $where_tlr"
             @test sprint(show, AnchoredInterval{Hour(1)}) ==
-                "AnchoredInterval{$(repr(Hour(1))),T,L,R} $where_tlr"
+                "HourBeginning{T, L, R} $where_tlr"
             @test sprint(show, AnchoredInterval{Day(-1)}) ==
-                "AnchoredInterval{$(repr(Day(-1))),T,L,R} $where_tlr"
+                "AnchoredInterval{$(repr(Day(-1))), T, L, R} $where_tlr"
             @test sprint(show, AnchoredInterval{Day(1)}) ==
-                "AnchoredInterval{$(repr(Day(1))),T,L,R} $where_tlr"
+                "AnchoredInterval{$(repr(Day(1))), T, L, R} $where_tlr"
             @test sprint(show, AnchoredInterval{Day(-1), DateTime}) ==
-                "AnchoredInterval{$(repr(Day(-1))),DateTime,L,R} $where_lr"
+                "AnchoredInterval{$(repr(Day(-1))), DateTime, L, R} $where_lr"
             @test sprint(show, AnchoredInterval{Day(1), DateTime}) ==
-                "AnchoredInterval{$(repr(Day(1))),DateTime,L,R} $where_lr"
+                "AnchoredInterval{$(repr(Day(1))), DateTime, L, R} $where_lr"
         end
 
         # Tuples contain fields: interval, printed, shown
@@ -285,11 +282,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 HourEnding(dt),
                 "(2016-08-11 HE02]",
                 string(
-                    if VERSION >= v"1.6.0-DEV.347"
-                        "HourEnding{DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Hour(-1))),DateTime,Open,Closed}"
-                    end,
+                    "HourEnding{DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 11, 2))))",
                 ),
             ),
@@ -297,11 +290,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 HourEnding{Closed, Open}(DateTime(2013, 2, 13)),
                 "[2013-02-12 HE24)",
                 string(
-                    if VERSION >= v"1.6.0-DEV.347"
-                        "HourEnding{DateTime, Closed, Open}"
-                    else
-                        "AnchoredInterval{$(repr(Hour(-1))),DateTime,Closed,Open}"
-                    end,
+                    "HourEnding{DateTime, Closed, Open}",
                     "($(repr(DateTime(2013, 2, 13))))",
                 ),
             ),
@@ -309,11 +298,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 HourEnding(dt + Minute(15) + Second(30)),
                 "(2016-08-11 HE02:15:30]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "HourEnding{DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Hour(-1))),DateTime,Open,Closed}"
-                    end,
+                    "HourEnding{DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 11, 2, 15, 30))))",
                 ),
             ),
@@ -321,11 +306,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 HourEnding(dt + Millisecond(2)),
                 "(2016-08-11 HE02:00:00.002]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "HourEnding{DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Hour(-1))),DateTime,Open,Closed}"
-                    end,
+                    "HourEnding{DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 11, 2, 0, 0, 2))))",
                 ),
             ),
@@ -333,11 +314,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 HourEnding{Closed, Open}(DateTime(2013, 2, 13, 0, 1)),
                 "[2013-02-13 HE00:01:00)",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "HourEnding{DateTime, Closed, Open}"
-                    else
-                        "AnchoredInterval{$(repr(Hour(-1))),DateTime,Closed,Open}"
-                    end,
+                    "HourEnding{DateTime, Closed, Open}",
                     "($(repr(DateTime(2013, 2, 13, 0, 1))))",
                 ),
             ),
@@ -345,11 +322,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 HourBeginning(dt),
                 "[2016-08-11 HB02)",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "HourBeginning{DateTime, Closed, Open}"
-                    else
-                        "AnchoredInterval{$(repr(Hour(1))),DateTime,Closed,Open}"
-                    end,
+                    "HourBeginning{DateTime, Closed, Open}",
                     "($(repr(DateTime(2016, 8, 11, 2))))",
                 ),
             ),
@@ -357,11 +330,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 HourBeginning{Open, Closed}(DateTime(2013, 2, 13)),
                 "(2013-02-13 HB00]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "HourBeginning{DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Hour(1))),DateTime,Open,Closed}"
-                    end,
+                    "HourBeginning{DateTime, Open, Closed}",
                     "($(repr(DateTime(2013, 2, 13))))",
                 ),
             ),
@@ -369,11 +338,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 HourEnding(ZonedDateTime(dt, tz"America/Winnipeg")),
                 "(2016-08-11 HE02-05:00]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "HourEnding{$ZonedDateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Hour(-1))),$ZonedDateTime,Open,Closed}"
-                    end,
+                    "HourEnding{$ZonedDateTime, Open, Closed}",
                     "($(repr(ZonedDateTime(dt, tz"America/Winnipeg"))))",
                 ),
             ),
@@ -381,11 +346,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Year(-1)}(Date(dt)),
                 "(YE 2016-08-11]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Year(-1))), Date, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Year(-1))),Date,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Year(-1))), Date, Open, Closed}",
                     "($(repr(Date(2016, 8, 11))))",
                 ),
             ),
@@ -393,11 +354,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Year(-1)}(ceil(Date(dt), Year)),
                 "(YE 2017-01-01]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Year(-1))), Date, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Year(-1))),Date,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Year(-1))), Date, Open, Closed}",
                     "($(repr(Date(2017, 1, 1))))",
                 ),
             ),
@@ -405,11 +362,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Month(-1)}(dt),
                 "(MoE 2016-08-11 02:00:00]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Month(-1))), DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Month(-1))),DateTime,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Month(-1))), DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 11, 2, 0, 0))))",
                 ),
             ),
@@ -417,11 +370,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Month(-1)}(ceil(dt, Month)),
                 "(MoE 2016-09-01]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Month(-1))), DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Month(-1))),DateTime,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Month(-1))), DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 9, 1))))",
                 ),
             ),
@@ -429,11 +378,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Day(-1)}(DateTime(dt)),
                 "(DE 2016-08-11 02:00:00]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Day(-1))), DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Day(-1))),DateTime,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Day(-1))), DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 11, 2))))",
                 ),
             ),
@@ -441,11 +386,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Day(-1)}(ceil(DateTime(dt), Day)),
                 "(DE 2016-08-12]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Day(-1))), DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Day(-1))),DateTime,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Day(-1))), DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 12))))",
                 ),
             ),
@@ -454,11 +395,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Day(-1)}(Date(dt)),
                 "(DE 2016-08-11]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Day(-1))), Date, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Day(-1))),Date,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Day(-1))), Date, Open, Closed}",
                     "($(repr(Date(2016, 8, 11))))",
                 ),
             ),
@@ -470,11 +407,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 ),
                 "(DE 2016-08-12 00:00:00-05:00]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Day(-1))), $ZonedDateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Day(-1))),$ZonedDateTime,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Day(-1))), $ZonedDateTime, Open, Closed}",
                     "($(repr(ZonedDateTime(2016, 8, 12, tz"America/Winnipeg"))))",
                 ),
             ),
@@ -482,11 +415,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Minute(-5)}(dt),
                 "(2016-08-11 5ME02:00]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Minute(-5))), DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Minute(-5))),DateTime,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Minute(-5))), DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 11, 2))))",
                 ),
             ),
@@ -494,11 +423,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Second(-30)}(dt),
                 "(2016-08-11 30SE02:00:00]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Second(-30))), DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Second(-30))),DateTime,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Second(-30))), DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 11, 2))))",
                 ),
             ),
@@ -506,11 +431,7 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
                 AnchoredInterval{Millisecond(-10)}(dt),
                 "(2016-08-11 10msE02:00:00.000]",
                 string(
-                    if VERSION >= v"1.6.0"
-                        "AnchoredInterval{$(repr(Millisecond(-10))), DateTime, Open, Closed}"
-                    else
-                        "AnchoredInterval{$(repr(Millisecond(-10))),DateTime,Open,Closed}"
-                    end,
+                    "AnchoredInterval{$(repr(Millisecond(-10))), DateTime, Open, Closed}",
                     "($(repr(DateTime(2016, 8, 11, 2))))",
                 ),
            ),
@@ -532,23 +453,13 @@ using Intervals: Bounded, Ending, Beginning, canonicalize, isunbounded
         @test string(interval) == "(0 .. 10]"
         @test sprint(show, interval, context=:compact=>true) == string(interval)
 
-        shown = if VERSION >= v"1.6.0"
-            "AnchoredInterval{-10, $Int, Open, Closed}(10)"
-        else
-            "AnchoredInterval{-10,$Int,Open,Closed}(10)"
-        end
-        @test sprint(show, interval) == shown
+        @test sprint(show, interval) == "AnchoredInterval{-10, $Int, Open, Closed}(10)"
 
         interval = AnchoredInterval{25}('a')
         @test string(interval) == "[a .. z)"
         @test sprint(show, interval, context=:compact=>true) == string(interval)
 
-        shown = if VERSION >= v"1.6.0"
-            "AnchoredInterval{25, Char, Closed, Open}('a')"
-        else
-            "AnchoredInterval{25,Char,Closed,Open}('a')"
-        end
-        @test sprint(show, interval) == shown
+        @test sprint(show, interval) == "AnchoredInterval{25, Char, Closed, Open}('a')"
     end
 
     @testset "equality" begin
diff --git a/test/interval.jl b/test/interval.jl
index 84fd9818..0025e14e 100644
--- a/test/interval.jl
+++ b/test/interval.jl
@@ -282,33 +282,17 @@
         interval = Interval{Open, Open}(1, 2)
         @test string(interval) == "(1 .. 2)"
         @test sprint(show, interval, context=:compact=>true) == string(interval)
-
-        shown = if VERSION >= v"1.6.0"
-             "Interval{$Int, Open, Open}(1, 2)"
-        else
-             "Interval{$Int,Open,Open}(1, 2)"
-        end
-        @test sprint(show, interval) == shown
+        @test sprint(show, interval) == "Interval{$Int, Open, Open}(1, 2)"
 
         interval = Interval{Open, Closed}('a', 'b')
         @test string(interval) == "(a .. b]"
         @test sprint(show, interval, context=:compact=>true) == string(interval)
-        shown = if VERSION >= v"1.6.0"
-            "Interval{Char, Open, Closed}('a', 'b')"
-        else
-            "Interval{Char,Open,Closed}('a', 'b')"
-        end
-        @test sprint(show, interval) == shown
+        @test sprint(show, interval) == "Interval{Char, Open, Closed}('a', 'b')"
 
         interval = Interval{Closed, Open}(Date(2012), Date(2013))
 
-        type_str = if VERSION >= v"1.6.0"
-            "Interval{Date, Closed, Open}"
-        else
-            "Interval{Date,Closed,Open}"
-        end
         shown = string(
-            type_str,
+            "Interval{Date, Closed, Open}",
             "(",
             sprint(show, Date(2012, 1, 1)),
             ", ",
@@ -323,12 +307,7 @@
         interval = Interval{Closed, Closed}("a", "b")
         @test string(interval) == "[a .. b]"
         @test sprint(show, interval, context=:compact=>true) == string(interval)
-        shown = if VERSION >= v"1.6.0"
-            "Interval{String, Closed, Closed}(\"a\", \"b\")"
-        else
-            "Interval{String,Closed,Closed}(\"a\", \"b\")"
-        end
-        @test sprint(show, interval) == shown
+        @test sprint(show, interval) == "Interval{String, Closed, Closed}(\"a\", \"b\")"
     end
 
     @testset "equality" begin
diff --git a/test/plotting.jl b/test/plotting.jl
index 70f17633..d0924a14 100644
--- a/test/plotting.jl
+++ b/test/plotting.jl
@@ -6,12 +6,12 @@ using VisualRegressionTests
     @testset "Interval{Float64,$L,$R}" for (L, R) in BOUND_PERMUTATIONS
         intervals = [Interval{L,R}(float(x), float(x + 0.5)) for x in 1:11]
         plot_file = "interval_$(lowercase("$(L)_$(R)")).png"
-        @plottest plot(intervals, 1:11) "references/$plot_file" false
+        @plottest plot(intervals, 1:11) "references/$plot_file" false 0.01
 
         @testset "scatter" begin
             # Earlier versions of this functionality showed only end-points if plotted in
             # scatter, but for intervals the connect-line is part of the "marker"
-            @plottest scatter(intervals, 1:11) "references/$plot_file" false
+            @plottest scatter(intervals, 1:11) "references/$plot_file" false 0.01
         end
     end
 
@@ -22,12 +22,12 @@ using VisualRegressionTests
 
         @testset "Interval{DateTime}" begin
             date_intervals = [dt .. (dt + Hour(1)) for dt in datetimes]
-            @plottest plot(date_intervals, 1:11) "references/interval_datetime.png" false
+            @plottest plot(date_intervals, 1:11) "references/interval_datetime.png" false 0.01
         end
 
         @testset "AnchoredInterval" begin
-            @plottest plot(HE.(datetimes), 1:11) "references/HE.png" false
-            @plottest plot(HB.(datetimes), 1:11) "references/HB.png" false
+            @plottest plot(HE.(datetimes), 1:11) "references/HE.png" false 0.01
+            @plottest plot(HB.(datetimes), 1:11) "references/HB.png" false 0.01
         end
     end
 end