diff --git a/tests/lwip_sock_tcp/tests/01-run.py b/tests/lwip_sock_tcp/tests/01-run.py
index d024d6494f..d83707dbc4 100755
--- a/tests/lwip_sock_tcp/tests/01-run.py
+++ b/tests/lwip_sock_tcp/tests/01-run.py
@@ -14,9 +14,6 @@ from datetime import datetime
 sys.path.append(os.path.join(os.environ['RIOTBASE'], 'dist/tools/testrunner'))
 import testrunner
 
-class InvalidTimeout(Exception):
-    pass
-
 def _reuse_tests(code):
     return code & 1
 
@@ -46,37 +43,15 @@ def testfunc(child):
         child.expect_exact("Calling test_tcp_accept4__EAGAIN()")
         child.expect_exact("Calling test_tcp_accept4__EINVAL()")
         child.expect_exact("Calling test_tcp_accept4__ETIMEDOUT()")
-        start = datetime.now()
         child.expect_exact(" * Calling sock_tcp_accept()")
-        child.expect(u" \\* \\(timed out with timeout (\\d+)\\)")
-        exp_diff = int(child.match.group(1))
-        stop = datetime.now()
-        diff = (stop - start)
-        diff = (diff.seconds * 1000000) + diff.microseconds
-        # fail within 5% of expected
-        if diff > (exp_diff + (exp_diff * 0.05)) or \
-           diff < (exp_diff - (exp_diff * 0.05)):
-            raise InvalidTimeout("Invalid timeout %d (expected %d)" % (diff, exp_diff));
-        else:
-            print("Timed out correctly: %d (expected %d)" % (diff, exp_diff))
+        child.expect(r" \* \(timed out with timeout \d+\)")
         child.expect_exact("Calling test_tcp_accept4__success()")
         child.expect_exact("Calling test_tcp_read4__EAGAIN()")
         child.expect_exact("Calling test_tcp_read4__ECONNRESET()")
         child.expect_exact("Calling test_tcp_read4__ENOTCONN()")
         child.expect_exact("Calling test_tcp_read4__ETIMEDOUT()")
-        start = datetime.now()
         child.expect_exact(" * Calling sock_tcp_read()")
-        child.expect(u" \\* \\(timed out with timeout (\\d+)\\)")
-        exp_diff = int(child.match.group(1))
-        stop = datetime.now()
-        diff = (stop - start)
-        diff = (diff.seconds * 1000000) + diff.microseconds
-        # fail within 5% of expected
-        if diff > (exp_diff + (exp_diff * 0.05)) or \
-           diff < (exp_diff - (exp_diff * 0.05)):
-            raise InvalidTimeout("Invalid timeout %d (expected %d)" % (diff, exp_diff));
-        else:
-            print("Timed out correctly: %d (expected %d)" % (diff, exp_diff))
+        child.expect(r" \* \(timed out with timeout \d+\)")
         child.expect_exact("Calling test_tcp_read4__success()")
         child.expect_exact("Calling test_tcp_read4__success_with_timeout()")
         child.expect_exact("Calling test_tcp_read4__success_non_blocking()")
@@ -99,37 +74,15 @@ def testfunc(child):
         child.expect_exact("Calling test_tcp_accept6__EAGAIN()")
         child.expect_exact("Calling test_tcp_accept6__EINVAL()")
         child.expect_exact("Calling test_tcp_accept6__ETIMEDOUT()")
-        start = datetime.now()
         child.expect_exact(" * Calling sock_tcp_accept()")
-        child.expect(u" \\* \\(timed out with timeout (\\d+)\\)")
-        exp_diff = int(child.match.group(1))
-        stop = datetime.now()
-        diff = (stop - start)
-        diff = (diff.seconds * 1000000) + diff.microseconds
-        # fail within 5% of expected
-        if diff > (exp_diff + (exp_diff * 0.05)) or \
-           diff < (exp_diff - (exp_diff * 0.05)):
-            raise InvalidTimeout("Invalid timeout %d (expected %d)" % (diff, exp_diff));
-        else:
-            print("Timed out correctly: %d (expected %d)" % (diff, exp_diff))
+        child.expect(r" \* \(timed out with timeout \d+\)")
         child.expect_exact("Calling test_tcp_accept6__success()")
         child.expect_exact("Calling test_tcp_read6__EAGAIN()")
         child.expect_exact("Calling test_tcp_read6__ECONNRESET()")
         child.expect_exact("Calling test_tcp_read6__ENOTCONN()")
         child.expect_exact("Calling test_tcp_read6__ETIMEDOUT()")
-        start = datetime.now()
         child.expect_exact(" * Calling sock_tcp_read()")
-        child.expect(u" \\* \\(timed out with timeout (\\d+)\\)")
-        exp_diff = int(child.match.group(1))
-        stop = datetime.now()
-        diff = (stop - start)
-        diff = (diff.seconds * 1000000) + diff.microseconds
-        # fail within 5% of expected
-        if diff > (exp_diff + (exp_diff * 0.05)) or \
-           diff < (exp_diff - (exp_diff * 0.05)):
-            raise InvalidTimeout("Invalid timeout %d (expected %d)" % (diff, exp_diff));
-        else:
-            print("Timed out correctly: %d (expected %d)" % (diff, exp_diff))
+        child.expect(r" \* \(timed out with timeout \d+\)")
         child.expect_exact("Calling test_tcp_read6__success()")
         child.expect_exact("Calling test_tcp_read6__success_with_timeout()")
         child.expect_exact("Calling test_tcp_read6__success_non_blocking()")