diff --git a/lib/nvml/NVML.jl b/lib/nvml/NVML.jl
index ff3529d243..039465b369 100644
--- a/lib/nvml/NVML.jl
+++ b/lib/nvml/NVML.jl
@@ -8,7 +8,20 @@ using CEnum
 
 using Libdl
 
-libnvml() = Sys.iswindows() ? "nvml" : "libnvidia-ml.so.1"
+function libnvml()
+    if Sys.iswindows()
+        # the NVSMI dir isn't added to PATH by the installer
+        nvsmi = joinpath(ENV["ProgramFiles"], "NVIDIA Corporation", "NVSMI")
+        if isdir(nvsmi)
+            joinpath(nvsmi, "nvml.dll")
+        else
+            # let's just hope for the best
+            "nvml"
+        end
+    else
+        "libnvidia-ml.so.1"
+    end
+end
 has_nvml() = Libdl.dlopen(libnvml(); throw_error=false) !== nothing
 
 # core library
diff --git a/test/runtests.jl b/test/runtests.jl
index e27b08a497..c8fa9b3440 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -80,8 +80,8 @@ for (rootpath, dirs, files) in walkdir(@__DIR__)
 end
 ## GPUArrays testsuite
 for name in keys(TestSuite.tests)
-    push!(tests, "gpuarrays/$name")
-    test_runners["gpuarrays/$name"] = ()->TestSuite.tests[name](CuArray)
+    push!(tests, "gpuarrays$(Base.Filesystem.path_separator)$name")
+    test_runners["gpuarrays$(Base.Filesystem.path_separator)$name"] = ()->TestSuite.tests[name](CuArray)
 end
 unique!(tests)