diff --git a/TESTS/netsocket/tcp/tcpsocket_send_timeout.cpp b/TESTS/netsocket/tcp/tcpsocket_send_timeout.cpp
index 6ad2b30467..4838289be4 100644
--- a/TESTS/netsocket/tcp/tcpsocket_send_timeout.cpp
+++ b/TESTS/netsocket/tcp/tcpsocket_send_timeout.cpp
@@ -33,6 +33,7 @@ void TCPSOCKET_SEND_TIMEOUT()
         TEST_FAIL();
         return;
     }
+    sock.set_blocking(false);
 
     int err;
     Timer timer;
@@ -42,7 +43,7 @@ void TCPSOCKET_SEND_TIMEOUT()
         timer.start();
         err = sock.send(tx_buffer, sizeof(tx_buffer));
         timer.stop();
-        if ((err == sizeof(tx_buffer)) &&
+        if ((err == sizeof(tx_buffer) || err == NSAPI_ERROR_WOULD_BLOCK) &&
                 (timer.read_ms() <= 800)) {
             continue;
         }
diff --git a/TESTS/netsocket/tls/tlssocket_send_timeout.cpp b/TESTS/netsocket/tls/tlssocket_send_timeout.cpp
index 6cfe1946ec..667bb9ba7b 100644
--- a/TESTS/netsocket/tls/tlssocket_send_timeout.cpp
+++ b/TESTS/netsocket/tls/tlssocket_send_timeout.cpp
@@ -34,6 +34,7 @@ void TLSSOCKET_SEND_TIMEOUT()
         TEST_FAIL();
         return;
     }
+    sock.set_blocking(false);
 
     int err;
     Timer timer;
@@ -43,7 +44,7 @@ void TLSSOCKET_SEND_TIMEOUT()
         timer.start();
         err = sock.send(tx_buffer, sizeof(tx_buffer));
         timer.stop();
-        if ((err == sizeof(tx_buffer)) &&
+        if ((err == sizeof(tx_buffer) || err == NSAPI_ERROR_WOULD_BLOCK) &&
                 (timer.read_ms() <= 800)) {
             continue;
         }