diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4259b8b..20cb18a 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -51,7 +51,7 @@ jobs:
         name: Unit tests upload
         if: ${{ failure() && steps.unit.conclusion == 'failure' }}
         with:
-          name: unit-tests-artifacts
+          name: unit-tests-artifacts-${{ matrix.os }}
           path: |
             test/unit/goldens
 
@@ -63,7 +63,7 @@ jobs:
         name: Functional tests upload
         if: ${{ failure() && steps.functional.conclusion == 'failure' }}
         with:
-          name: functional-tests-artifacts
+          name: functional-tests-artifacts-${{ matrix.os }}
           path: |
             test/functional/goldens
 
diff --git a/src/Pacer/Prelude.hs b/src/Pacer/Prelude.hs
index 0f28bc3..5d517d8 100644
--- a/src/Pacer/Prelude.hs
+++ b/src/Pacer/Prelude.hs
@@ -92,6 +92,7 @@ module Pacer.Prelude
     currentOsStr,
     isPosix,
     posixWindowsStr,
+    posixWindowsOsPath,
 
     -- * Misc
     pattern SetToSeqNE,
@@ -604,6 +605,12 @@ isPosix = case currentOs of
   Windows -> False
   _ -> True
 
+posixWindowsOsPath :: OsPath
+posixWindowsOsPath =
+  if isPosix
+    then [osp|posix|]
+    else [osp|windows|]
+
 posixWindowsStr :: String
 posixWindowsStr =
   if isPosix
diff --git a/test/unit/Unit/Pacer/Command/Chart/Params.hs b/test/unit/Unit/Pacer/Command/Chart/Params.hs
index 72310b4..2a22d87 100644
--- a/test/unit/Unit/Pacer/Command/Chart/Params.hs
+++ b/test/unit/Unit/Pacer/Command/Chart/Params.hs
@@ -54,7 +54,7 @@ successTests =
 
 testEvolvePhaseCliPaths :: TestTree
 testEvolvePhaseCliPaths =
-  testGoldenParams
+  testGoldenParamsOs
     $ MkGoldenParams
       { testDesc = "Uses CLI paths",
         testName = [osp|testEvolvePhaseCliPaths|],
@@ -79,7 +79,7 @@ testEvolvePhaseCliPaths =
 
 testEvolvePhaseCliData :: TestTree
 testEvolvePhaseCliData =
-  testGoldenParams
+  testGoldenParamsOs
     $ MkGoldenParams
       { testDesc = "Uses CLI data",
         testName = [osp|testEvolvePhaseCliData|],
@@ -105,7 +105,7 @@ testEvolvePhaseCliData =
 
 testEvolvePhaseConfigPaths :: TestTree
 testEvolvePhaseConfigPaths =
-  testGoldenParams
+  testGoldenParamsOs
     $ MkGoldenParams
       { testDesc = "Uses config paths",
         testName = [osp|testEvolvePhaseConfigPaths|],
@@ -133,7 +133,7 @@ testEvolvePhaseConfigPaths =
 
 testEvolvePhaseConfigData :: TestTree
 testEvolvePhaseConfigData =
-  testGoldenParams
+  testGoldenParamsOs
     $ MkGoldenParams
       { testDesc = "Uses config data",
         testName = [osp|testEvolvePhaseConfigData|],
@@ -161,7 +161,7 @@ testEvolvePhaseConfigData =
 
 testEvolvePhaseXdgPaths :: TestTree
 testEvolvePhaseXdgPaths =
-  testGoldenParams
+  testGoldenParamsOs
     $ MkGoldenParams
       { testDesc = "Uses xdg paths",
         testName = [osp|testEvolvePhaseXdgPaths|],
@@ -200,7 +200,7 @@ failureTests =
 
 testEvolvePhaseCliPathsEx :: TestTree
 testEvolvePhaseCliPathsEx =
-  testGoldenParams
+  testGoldenParamsOs
     $ MkGoldenParams
       { testDesc = "Exception for unknown CLI paths",
         testName = [osp|testEvolvePhaseCliPathsEx|],
@@ -225,7 +225,7 @@ testEvolvePhaseCliPathsEx =
 
 testEvolvePhaseConfigPathsEx :: TestTree
 testEvolvePhaseConfigPathsEx =
-  testGoldenParams
+  testGoldenParamsOs
     $ MkGoldenParams
       { testDesc = "Exception for unknown config paths",
         testName = [osp|testEvolvePhaseConfigPathsEx|],
@@ -250,7 +250,7 @@ testEvolvePhaseConfigPathsEx =
 
 testEvolvePhaseMissingEx :: TestTree
 testEvolvePhaseMissingEx =
-  testGoldenParams
+  testGoldenParamsOs
     $ MkGoldenParams
       { testDesc = "Exception for missing paths",
         testName = [osp|testEvolvePhaseMissingEx|],
@@ -287,17 +287,18 @@ runEvolvePhase xdg params mToml = do
     env =
       MkMockEnv
         { knownFiles =
-            Set.fromList
-              [ [osp|/root/cli-cr.toml|],
-                [osp|/root/cli-runs.toml|],
-                [osp|/root/cli-data/chart-requests.toml|],
-                [osp|/root/cli-data/runs.toml|],
-                [osp|/root/config-cr.toml|],
-                [osp|/root/config-runs.toml|],
-                [osp|/root/config-data/chart-requests.toml|],
-                [osp|/root/config-data/runs.toml|],
-                [osp|/root/xdg/config/pacer/chart-requests.toml|],
-                [osp|/root/xdg/config/pacer/runs.toml|]
+            Set.fromList $
+              (root </>) <$>
+              [ [ospPathSep|cli-cr.toml|],
+                [ospPathSep|cli-runs.toml|],
+                [ospPathSep|cli-data/chart-requests.toml|],
+                [ospPathSep|cli-data/runs.toml|],
+                [ospPathSep|config-cr.toml|],
+                [ospPathSep|config-runs.toml|],
+                [ospPathSep|config-data/chart-requests.toml|],
+                [ospPathSep|config-data/runs.toml|],
+                [ospPathSep|xdg/config/pacer/chart-requests.toml|],
+                [ospPathSep|xdg/config/pacer/runs.toml|]
               ],
           xdg
         }
@@ -318,7 +319,7 @@ runPathReaderMock ::
   Eff (PathReader : es) a ->
   Eff es a
 runPathReaderMock = interpret_ $ \case
-  CanonicalizePath p -> pure $ [osp|/root|] </> p
+  CanonicalizePath p -> pure $ root </> p
   DoesFileExist p -> do
     knownFiles <- asks @MockEnv (.knownFiles)
     pure $ p `Set.member` knownFiles
@@ -328,8 +329,8 @@ runPathReaderMock = interpret_ $ \case
         xdg <- asks @MockEnv (.xdg)
         pure
           $ if xdg
-            then [osp|/root/xdg/config|] </> p
-            else [osp|/root/bad_xdg/config|] </> p
+            then root </> [ospPathSep|xdg/config|] </> p
+            else root </> [ospPathSep|bad_xdg/config|] </> p
       _ -> error $ "runPathReaderMock: unexpected xdg type: " <> show d
   _ -> error $ "runPathReaderMock: unimplemented"
 
@@ -343,3 +344,9 @@ goldenRunnerXdg xdg params toml = do
     -- displayInner over displayException since we do not want unstable
     -- callstacks in output.
     Left ex -> encodeUtf8 $ packText $ Ann.displayInner ex
+
+root :: OsPath
+root =
+  if isPosix
+    then [osp|/root|]
+    else [osp|c:\\root|]
diff --git a/test/unit/Unit/Prelude.hs b/test/unit/Unit/Prelude.hs
index 93b09f6..b143127 100644
--- a/test/unit/Unit/Prelude.hs
+++ b/test/unit/Unit/Prelude.hs
@@ -17,6 +17,7 @@ module Unit.Prelude
     -- * Golden
     GoldenParams (..),
     testGoldenParams,
+    testGoldenParamsOs,
 
     -- * Parsing
     parseOrDie,
@@ -181,6 +182,14 @@ data GoldenParams = MkGoldenParams
     runner :: IO ByteString
   }
 
+testGoldenParamsOs :: GoldenParams -> TestTree
+testGoldenParamsOs goldenParams = testGoldenParams goldenParams'
+  where
+    goldenParams' =
+      goldenParams
+        { testName = goldenParams.testName <> ([osp|_|] <> posixWindowsOsPath)
+        }
+
 testGoldenParams :: GoldenParams -> TestTree
 testGoldenParams goldenParams =
   goldenVsFile goldenParams.testDesc goldenPath actualPath $ do
diff --git a/test/unit/goldens/testEvolvePhaseCliData.golden b/test/unit/goldens/testEvolvePhaseCliData_posix.golden
similarity index 100%
rename from test/unit/goldens/testEvolvePhaseCliData.golden
rename to test/unit/goldens/testEvolvePhaseCliData_posix.golden
diff --git a/test/unit/goldens/testEvolvePhaseCliData_windows.golden b/test/unit/goldens/testEvolvePhaseCliData_windows.golden
new file mode 100644
index 0000000..680ff7f
--- /dev/null
+++ b/test/unit/goldens/testEvolvePhaseCliData_windows.golden
@@ -0,0 +1,7 @@
+MkChartParams
+  { cleanInstall = False
+  , chartRequestsPath = "c:\\root\cli-data\chart-requests.toml"
+  , dataDir = ()
+  , json = False
+  , runsPath = "c:\\root\cli-data\runs.toml"
+  }
diff --git a/test/unit/goldens/testEvolvePhaseCliPathsEx.golden b/test/unit/goldens/testEvolvePhaseCliPathsEx_posix.golden
similarity index 100%
rename from test/unit/goldens/testEvolvePhaseCliPathsEx.golden
rename to test/unit/goldens/testEvolvePhaseCliPathsEx_posix.golden
diff --git a/test/unit/goldens/testEvolvePhaseCliPathsEx_windows.golden b/test/unit/goldens/testEvolvePhaseCliPathsEx_windows.golden
new file mode 100644
index 0000000..9a6c565
--- /dev/null
+++ b/test/unit/goldens/testEvolvePhaseCliPathsEx_windows.golden
@@ -0,0 +1 @@
+File not found: c:\\root\bad_cr.toml
diff --git a/test/unit/goldens/testEvolvePhaseCliPaths.golden b/test/unit/goldens/testEvolvePhaseCliPaths_posix.golden
similarity index 100%
rename from test/unit/goldens/testEvolvePhaseCliPaths.golden
rename to test/unit/goldens/testEvolvePhaseCliPaths_posix.golden
diff --git a/test/unit/goldens/testEvolvePhaseCliPaths_windows.golden b/test/unit/goldens/testEvolvePhaseCliPaths_windows.golden
new file mode 100644
index 0000000..7ce1d79
--- /dev/null
+++ b/test/unit/goldens/testEvolvePhaseCliPaths_windows.golden
@@ -0,0 +1,7 @@
+MkChartParams
+  { cleanInstall = False
+  , chartRequestsPath = "c:\\root\cli-cr.toml"
+  , dataDir = ()
+  , json = False
+  , runsPath = "c:\\root\cli-runs.toml"
+  }
diff --git a/test/unit/goldens/testEvolvePhaseConfigData.golden b/test/unit/goldens/testEvolvePhaseConfigData_posix.golden
similarity index 100%
rename from test/unit/goldens/testEvolvePhaseConfigData.golden
rename to test/unit/goldens/testEvolvePhaseConfigData_posix.golden
diff --git a/test/unit/goldens/testEvolvePhaseConfigData_windows.golden b/test/unit/goldens/testEvolvePhaseConfigData_windows.golden
new file mode 100644
index 0000000..94fde58
--- /dev/null
+++ b/test/unit/goldens/testEvolvePhaseConfigData_windows.golden
@@ -0,0 +1,7 @@
+MkChartParams
+  { cleanInstall = False
+  , chartRequestsPath = "c:\\root\config-data\chart-requests.toml"
+  , dataDir = ()
+  , json = False
+  , runsPath = "c:\\root\config-data\runs.toml"
+  }
diff --git a/test/unit/goldens/testEvolvePhaseConfigPathsEx.golden b/test/unit/goldens/testEvolvePhaseConfigPathsEx_posix.golden
similarity index 100%
rename from test/unit/goldens/testEvolvePhaseConfigPathsEx.golden
rename to test/unit/goldens/testEvolvePhaseConfigPathsEx_posix.golden
diff --git a/test/unit/goldens/testEvolvePhaseConfigPathsEx_windows.golden b/test/unit/goldens/testEvolvePhaseConfigPathsEx_windows.golden
new file mode 100644
index 0000000..9c70f14
--- /dev/null
+++ b/test/unit/goldens/testEvolvePhaseConfigPathsEx_windows.golden
@@ -0,0 +1 @@
+File not found: c:\\root\bad-cr.toml
diff --git a/test/unit/goldens/testEvolvePhaseConfigPaths.golden b/test/unit/goldens/testEvolvePhaseConfigPaths_posix.golden
similarity index 100%
rename from test/unit/goldens/testEvolvePhaseConfigPaths.golden
rename to test/unit/goldens/testEvolvePhaseConfigPaths_posix.golden
diff --git a/test/unit/goldens/testEvolvePhaseConfigPaths_windows.golden b/test/unit/goldens/testEvolvePhaseConfigPaths_windows.golden
new file mode 100644
index 0000000..1444b18
--- /dev/null
+++ b/test/unit/goldens/testEvolvePhaseConfigPaths_windows.golden
@@ -0,0 +1,7 @@
+MkChartParams
+  { cleanInstall = False
+  , chartRequestsPath = "c:\\root\config-cr.toml"
+  , dataDir = ()
+  , json = False
+  , runsPath = "c:\\root\config-runs.toml"
+  }
diff --git a/test/unit/goldens/testEvolvePhaseMissingEx.golden b/test/unit/goldens/testEvolvePhaseMissingEx_posix.golden
similarity index 100%
rename from test/unit/goldens/testEvolvePhaseMissingEx.golden
rename to test/unit/goldens/testEvolvePhaseMissingEx_posix.golden
diff --git a/test/unit/goldens/testEvolvePhaseMissingEx_windows.golden b/test/unit/goldens/testEvolvePhaseMissingEx_windows.golden
new file mode 100644
index 0000000..d9aea34
--- /dev/null
+++ b/test/unit/goldens/testEvolvePhaseMissingEx_windows.golden
@@ -0,0 +1,4 @@
+Required chart file not found. Searched for paths(s) [chart-requests.toml] in directories:
+ - some-dir
+ - some-config-data
+ - c:\\root\bad_xdg\config\pacer\
diff --git a/test/unit/goldens/testEvolvePhaseXdgPaths.golden b/test/unit/goldens/testEvolvePhaseXdgPaths_posix.golden
similarity index 100%
rename from test/unit/goldens/testEvolvePhaseXdgPaths.golden
rename to test/unit/goldens/testEvolvePhaseXdgPaths_posix.golden
diff --git a/test/unit/goldens/testEvolvePhaseXdgPaths_windows.golden b/test/unit/goldens/testEvolvePhaseXdgPaths_windows.golden
new file mode 100644
index 0000000..13d2e25
--- /dev/null
+++ b/test/unit/goldens/testEvolvePhaseXdgPaths_windows.golden
@@ -0,0 +1,7 @@
+MkChartParams
+  { cleanInstall = False
+  , chartRequestsPath = "c:\\root\xdg\config\pacer\chart-requests.toml"
+  , dataDir = ()
+  , json = False
+  , runsPath = "c:\\root\xdg\config\pacer\runs.toml"
+  }