diff --git a/R/spark_read_bigquery.R b/R/spark_read_bigquery.R
index 974b3a1..e5cbf60 100644
--- a/R/spark_read_bigquery.R
+++ b/R/spark_read_bigquery.R
@@ -97,7 +97,7 @@ spark_read_bigquery <- function(sc,
                                 ...) {
   parameters <- c(list(), additionalParameters)
   if (!is.null(serviceAccountKeyFile)) {
-    parameters[["credentialsFile"]] = normalizePath(serviceAccountKeyFile, winslash = "/")
+    parameters[["credentialsFile"]] = gsub("\\\\", "/", serviceAccountKeyFile)
   }
   
   if (!is.null(datasetId) && !is.null(tableId)) {
diff --git a/R/spark_write_bigquery.R b/R/spark_write_bigquery.R
index cc6f7c1..5c3aab7 100644
--- a/R/spark_write_bigquery.R
+++ b/R/spark_write_bigquery.R
@@ -80,7 +80,7 @@ spark_write_bigquery <- function(data,
   additionalParameters)
   
   if (!is.null(serviceAccountKeyFile)) {
-    parameters[["credentialsFile"]] = normalizePath(serviceAccountKeyFile, winslash = "/")
+    parameters[["credentialsFile"]] = gsub("\\\\", "/", serviceAccountKeyFile)
   }
   
   spark_write_source(data,
diff --git a/tests/testthat/setup.R b/tests/testthat/setup.R
index 608faf0..bf54f48 100644
--- a/tests/testthat/setup.R
+++ b/tests/testthat/setup.R
@@ -2,7 +2,7 @@
 bigquery_defaults(
   billingProjectId = Sys.getenv("BILLING_PROJECT_ID"),
   materializationDataset = Sys.getenv("MATERIALIZATION_DATASET"),
-  serviceAccountKeyFile = normalizePath(Sys.getenv("GOOGLE_APPLICATION_CREDENTIALS"), winslash = "/")
+  serviceAccountKeyFile = Sys.getenv("GOOGLE_APPLICATION_CREDENTIALS")
 )
 
 options(spark.version = Sys.getenv("SPARK_VERSION", "3.5"))