diff --git a/test/runtests.jl b/test/runtests.jl
index 13e6267..891bc06 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -20,8 +20,11 @@ using Base.Test
 end
 
 @testset "Formatting" begin
-    @test Showoff.format_fixed(10.0, 0) == "10"
+    @test Showoff.format_fixed(-10.0, 0) == "-10"
     @test Showoff.format_fixed(0.012345, 3) == "0.012"
+    @test Showoff.format_fixed(Inf, 1) == "∞"
+    @test Showoff.format_fixed(-Inf, 1) == "-∞"
+    @test Showoff.format_fixed(NaN, 1) == "NaN"
     @test Showoff.format_fixed_scientific(0.0, 1, false) == "0"
     @test Showoff.format_fixed_scientific(Inf, 1, false) == "∞"
     @test Showoff.format_fixed_scientific(-Inf, 1, false) == "-∞"
@@ -33,9 +36,11 @@ end
 @testset "Showoff" begin
     x = [1.12345, 4.5678]
     @test showoff(x) == ["1.12345", "4.56780"]
+    @test showoff([0.0, 50000.0]) == ["0", "5×10⁴"]
     @test showoff(x, :plain) == ["1.12345", "4.56780"]
     @test showoff(x, :scientific) == ["1.12345×10⁰", "4.56780×10⁰"]
     @test showoff(x, :engineering) == ["1.12345×10⁰", "4.56780×10⁰"]
     @test showoff([Dates.DateTime("2017-04-11", "yyyy-mm-dd")]) == ["Apr 11, 2017"]
     @test_throws ArgumentError showoff(x, :nevergonnagiveyouup)
+    @test_throws ArgumentError showoff([Inf, Inf, NaN])
 end