diff --git a/test/runtests.jl b/test/runtests.jl
index d132cbaea..57b997a8d 100755
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -75,13 +75,15 @@ testfiles = isempty(ARGS) ?
         ARGS
 
 @testset "Gadfly" begin
-    for filename in testfiles, (backend_name, backend) in backends
-        @info string(filename,'.',backend_name)
+    for filename in testfiles
         Random.seed!(1)
         p = evalfile(joinpath(testdir, "$(filename).jl"))
         @test typeof(p) in [Plot,Compose.Context]
-        r = draw(backend(filename), p)
-        @test typeof(r) in [Bool,Nothing]
+        for (backend_name, backend) in backends
+            @info string(filename,'.',backend_name)
+            r = draw(backend(filename), p)
+            @test typeof(r) in [Bool,Nothing]
+        end
     end
 end
 
diff --git a/test/testscripts/density_dark.jl b/test/testscripts/density_dark.jl
index 59727ae77..755e28364 100644
--- a/test/testscripts/density_dark.jl
+++ b/test/testscripts/density_dark.jl
@@ -2,27 +2,21 @@ using Gadfly, RDatasets, Test, Base64
 
 set_default_plot_size(6inch, 3inch)
 
-global density_dark_tested
 
 p = Gadfly.with_theme(:dark) do
     plot(dataset("ggplot2", "diamonds"), x="Price", color="Cut", Geom.density)
 end
 
-# prevent these tests from running more than once
-if ! @isdefined density_dark_tested
     svg_str_dark = stringmime(MIME("image/svg+xml"), p)
     @test occursin(Base.hex(Gadfly.dark_theme.default_color), svg_str_dark)
-    @test occursin(Base.hex(Gadfly.dark_theme.background_color), svg_str_dark)
-    @test occursin(Base.hex(Gadfly.dark_theme.panel_fill), svg_str_dark)
+    @test occursin("rgba(34,40,48,1)", svg_str_dark) # dark theme background color
+    @test occursin("rgba(34,40,48,1)", svg_str_dark) # dark theme panel fill
 
     # Test reset.
     p2 = plot(dataset("ggplot2", "diamonds"), x="Price", color="Cut", Geom.density)
     svg_str_light = stringmime(MIME("image/svg+xml"), p2)
     @test !occursin(Base.hex(Gadfly.dark_theme.default_color), svg_str_light)
-    @test !occursin(Base.hex(Gadfly.dark_theme.background_color), svg_str_light)
-    @test !occursin(Base.hex(Gadfly.dark_theme.panel_fill), svg_str_light)
+    @test !occursin("rgba(34,40,48,1)", svg_str_light)
 
-    density_dark_tested=true
-end
 
 p