diff --git a/x-pack/plugin/sql/jdbc/src/test/java/org/elasticsearch/xpack/sql/jdbc/JdbcHttpClientRequestTests.java b/x-pack/plugin/sql/jdbc/src/test/java/org/elasticsearch/xpack/sql/jdbc/JdbcHttpClientRequestTests.java
index cd8ff60d71c3a..bc86c778f718b 100644
--- a/x-pack/plugin/sql/jdbc/src/test/java/org/elasticsearch/xpack/sql/jdbc/JdbcHttpClientRequestTests.java
+++ b/x-pack/plugin/sql/jdbc/src/test/java/org/elasticsearch/xpack/sql/jdbc/JdbcHttpClientRequestTests.java
@@ -53,7 +53,11 @@ public static void init() throws Exception {
 
     @AfterClass
     public static void cleanup() {
-        webServer.close();
+        try {
+            webServer.close();
+        } finally {
+            webServer = null;
+        }
     }
 
     public void testBinaryRequestEnabled() throws Exception {
diff --git a/x-pack/plugin/sql/sql-client/src/test/java/org/elasticsearch/xpack/sql/client/HttpClientRequestTests.java b/x-pack/plugin/sql/sql-client/src/test/java/org/elasticsearch/xpack/sql/client/HttpClientRequestTests.java
index 7df82ebe1d446..01ca2bd0dade1 100644
--- a/x-pack/plugin/sql/sql-client/src/test/java/org/elasticsearch/xpack/sql/client/HttpClientRequestTests.java
+++ b/x-pack/plugin/sql/sql-client/src/test/java/org/elasticsearch/xpack/sql/client/HttpClientRequestTests.java
@@ -59,7 +59,11 @@ public static void init() throws Exception {
 
     @AfterClass
     public static void cleanup() {
-        webServer.close();
+        try {
+            webServer.close();
+        } finally {
+            webServer = null;
+        }
     }
     
     public void testBinaryRequestForCLIEnabled() throws URISyntaxException {
@@ -145,7 +149,7 @@ private void assertBinaryRequestForDrivers(boolean isBinary, XContentType xConte
         HttpClient httpClient = new HttpClient(conCfg);
         
         Mode mode = randomFrom(Mode.JDBC, Mode.ODBC);
-        SqlQueryRequest request = new SqlQueryRequest(query, 
+        SqlQueryRequest request = new SqlQueryRequest(query,
                 null,
                 ZoneId.of("Z"),
                 randomIntBetween(1, 100),