diff --git a/index.js b/index.js
index 1ea6cd2..1bb6666 100644
--- a/index.js
+++ b/index.js
@@ -104,7 +104,7 @@ class TestExclude {
 
     globSync(cwd = this.cwd) {
         const globPatterns = getExtensionPattern(this.extension || []);
-        const globOptions = { cwd, nodir: true, dot: true };
+        const globOptions = { cwd, nodir: true, dot: true, posix: true };
         /* If we don't have any excludeNegated then we can optimize glob by telling
          * it to not iterate into unwanted directory trees (like node_modules). */
         if (this.excludeNegated.length === 0) {
@@ -118,7 +118,7 @@ class TestExclude {
 
     async glob(cwd = this.cwd) {
         const globPatterns = getExtensionPattern(this.extension || []);
-        const globOptions = { cwd, nodir: true, dot: true };
+        const globOptions = { cwd, nodir: true, dot: true, posix: true };
         /* If we don't have any excludeNegated then we can optimize glob by telling
          * it to not iterate into unwanted directory trees (like node_modules). */
         if (this.excludeNegated.length === 0) {