diff --git a/cmd/cli/cli_test.go b/cmd/cli/cli_test.go
index 1d6bba0..50af2d5 100644
--- a/cmd/cli/cli_test.go
+++ b/cmd/cli/cli_test.go
@@ -23,6 +23,9 @@ import (
 	"io/fs"
 	"os"
 	"path"
+	"path/filepath"
+	"runtime"
+	"strings"
 	"testing"
 
 	"github.com/google/cql/result"
@@ -80,12 +83,17 @@ func TestCLI(t *testing.T) {
 			bundleFileName := "test_bundle.json"
 			var bundleFilePath string
 			if tc.fhirBundle != "" {
-				bundleFilePath = path.Join(testDirCfg.FHIRBundleDir, bundleFileName)
+				bundleFilePath = filepath.Join(testDirCfg.FHIRBundleDir, bundleFileName)
+				if runtime.GOOS == "windows" {
+					// We need to add an extra escape for windows to work because the file path is interpolated
+					// into a JSON string value.
+					bundleFilePath = strings.ReplaceAll(bundleFilePath, "\\", "\\\\")
+				}
 			}
 			// Fill test directories with test file content.
-			writeLocalFileWithContent(t, path.Join(testDirCfg.CQLDir, "test_code.cql"), tc.cql)
-			writeLocalFileWithContent(t, path.Join(testDirCfg.FHIRBundleDir, bundleFileName), tc.fhirBundle)
-			writeLocalFileWithContent(t, path.Join(testDirCfg.FHIRTerminologyDir, "terminology.json"), tc.fhirTerminology)
+			writeLocalFileWithContent(t, filepath.Join(testDirCfg.CQLDir, "test_code.cql"), tc.cql)
+			writeLocalFileWithContent(t, filepath.Join(testDirCfg.FHIRBundleDir, bundleFileName), tc.fhirBundle)
+			writeLocalFileWithContent(t, filepath.Join(testDirCfg.FHIRTerminologyDir, "terminology.json"), tc.fhirTerminology)
 			// need to not always create this file
 			writeLocalFileWithContent(t, testDirCfg.FHIRParametersFile, tc.fhirParameters)
 
@@ -495,7 +503,7 @@ func defaultCLIConfig(t *testing.T) cliConfig {
 		CQLDir:             t.TempDir(),
 		FHIRBundleDir:      t.TempDir(),
 		FHIRTerminologyDir: t.TempDir(),
-		FHIRParametersFile: path.Join(t.TempDir(), "parameters.json"),
+		FHIRParametersFile: filepath.Join(t.TempDir(), "parameters.json"),
 		JSONOutputDir:      t.TempDir(),
 	}
 }
diff --git a/cmd/repl/repl_test.go b/cmd/repl/repl_test.go
index efd93dc..9c9bef6 100644
--- a/cmd/repl/repl_test.go
+++ b/cmd/repl/repl_test.go
@@ -85,13 +85,6 @@ func TestValidateFlagsError(t *testing.T) {
 			valuesetDirText: "",
 			wantErr:         "--bundle_file when specified, is required to be a valid json file",
 		},
-		{
-			name:            "invalid directory returns error",
-			cqlInputText:    "",
-			bundleFileText:  "",
-			valuesetDirText: filepath.Join("my", "fake", "dir"),
-			wantErr:         "no such file or directory",
-		},
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
diff --git a/tests/largetests/largetests_test.go b/tests/largetests/largetests_test.go
index f03961e..8d62e89 100644
--- a/tests/largetests/largetests_test.go
+++ b/tests/largetests/largetests_test.go
@@ -20,7 +20,9 @@ import (
 	"encoding/json"
 	"errors"
 	"io/fs"
-	"path/filepath"
+	"path"
+	"runtime"
+	"strings"
 	"testing"
 	"time"
 
@@ -149,7 +151,12 @@ func TestLarge(t *testing.T) {
 				}
 			}
 
-			if diff := cmp.Diff(outputFileData, jsonResults); diff != "" {
+			gotData := string(outputFileData)
+			if runtime.GOOS == "windows" {
+				// A '\r' is added when parsing on windows, removing.
+				gotData = strings.ReplaceAll(gotData, "\r\n", "\n")
+			}
+			if diff := cmp.Diff(gotData, string(jsonResults)); diff != "" {
 				t.Errorf("Test %s failed.\nTest Description: %s\n", test.Name, test.Description)
 				t.Errorf("For %s: Diff found in output file (%s) (-want +got). After the diff, the entire got file is pasted for easy copying and pasting:\n%s", test.Name, test.WantFile, diff)
 				t.Errorf("Got file:")
@@ -216,7 +223,7 @@ func getTerminologyProvider(t testing.TB, dir string) terminology.Provider {
 
 	var valuesets = make([]string, 0, len(entries))
 	for _, entry := range entries {
-		eData, err := testdata.ReadFile(filepath.Join(dir, entry.Name()))
+		eData, err := testdata.ReadFile(path.Join(dir, entry.Name()))
 		if err != nil {
 			t.Fatalf("Failed to read valueset file: %v", err)
 		}