diff --git a/mysql-test/include/have_example_plugin.inc b/mysql-test/include/have_example_plugin.inc
index 8920399555d..88f4e212102 100644
--- a/mysql-test/include/have_example_plugin.inc
+++ b/mysql-test/include/have_example_plugin.inc
@@ -15,7 +15,7 @@ if (!$EXAMPLE_PLUGIN) {
 #
 # Check if --plugin-dir was setup for exampledb
 #
-if (`SELECT CONCAT('--plugin-dir=', @@plugin_dir) != '$EXAMPLE_PLUGIN_OPT'`) {
+if (`SELECT CONCAT('--plugin-dir=', REPLACE(@@plugin_dir, '\\\\', '/')) != '$EXAMPLE_PLUGIN_OPT/'`) {
   --skip Example plugin requires that --plugin-dir is set to the example plugin dir (either the .opt file does not contain \$EXAMPLE_PLUGIN_OPT or another plugin is in use)
 }
 enable_query_log;
diff --git a/mysql-test/include/have_semisync_plugin.inc b/mysql-test/include/have_semisync_plugin.inc
index 95899f559aa..1cd3b30be1c 100644
--- a/mysql-test/include/have_semisync_plugin.inc
+++ b/mysql-test/include/have_semisync_plugin.inc
@@ -16,6 +16,6 @@ if (!$SEMISYNC_MASTER_PLUGIN)
 #
 # Check if --plugin-dir was setup for semisync
 #
-if (`SELECT CONCAT('--plugin-dir=', @@plugin_dir) != '$SEMISYNC_PLUGIN_OPT'`) {
+if (`SELECT CONCAT('--plugin-dir=', REPLACE(@@plugin_dir, '\\\\', '/')) != '$SEMISYNC_PLUGIN_OPT/'`) {
   --skip SEMISYNC plugin requires that --plugin-dir is set to the semisync plugin dir (either the .opt file does not contain \$SEMISYNC_PLUGIN_OPT or another plugin is in use)
 }
diff --git a/mysql-test/include/have_simple_parser.inc b/mysql-test/include/have_simple_parser.inc
index d077916c5e7..0cedad27a77 100644
--- a/mysql-test/include/have_simple_parser.inc
+++ b/mysql-test/include/have_simple_parser.inc
@@ -15,6 +15,6 @@ if (!$SIMPLE_PARSER) {
 #
 # Check if --plugin-dir was setup for simple parser
 #
-if (`SELECT CONCAT('--plugin-dir=', @@plugin_dir) != '$SIMPLE_PARSER_OPT'`) {
+if (`SELECT CONCAT('--plugin-dir=', REPLACE(@@plugin_dir, '\\\\', '/')) != '$SIMPLE_PARSER_OPT/'`) {
   --skip simple parser requires that --plugin-dir is set to the udf plugin dir (either the .opt file does not contain \$UDF_EXAMPLE_LIB_OPT or another plugin is in use)
 }
diff --git a/mysql-test/include/have_udf.inc b/mysql-test/include/have_udf.inc
index 5c404b03729..993b9e13fdb 100644
--- a/mysql-test/include/have_udf.inc
+++ b/mysql-test/include/have_udf.inc
@@ -15,6 +15,6 @@ if (!$UDF_EXAMPLE_LIB) {
 #
 # Check if --plugin-dir was setup for udf
 #
-if (`SELECT CONCAT('--plugin-dir=', @@plugin_dir) != '$UDF_EXAMPLE_LIB_OPT'`) {
+if (`SELECT CONCAT('--plugin-dir=', REPLACE(@@plugin_dir, '\\\\', '/')) != '$UDF_EXAMPLE_LIB_OPT/'`) {
   --skip UDF requires that --plugin-dir is set to the udf plugin dir (either the .opt file does not contain \$UDF_EXAMPLE_LIB_OPT or another plugin is in use)
 }
diff --git a/mysql-test/t/udf_skip_grants-master.opt b/mysql-test/t/udf_skip_grants-master.opt
index 5699a3387b8..015d0014da0 100644
--- a/mysql-test/t/udf_skip_grants-master.opt
+++ b/mysql-test/t/udf_skip_grants-master.opt
@@ -1 +1,2 @@
 --skip-grant-tables
+$UDF_EXAMPLE_LIB_OPT