diff --git a/tests/periph_cpuid/tests/01-run.py b/tests/periph_cpuid/tests/01-run.py
index becd6c775f..fd3dbcc57a 100755
--- a/tests/periph_cpuid/tests/01-run.py
+++ b/tests/periph_cpuid/tests/01-run.py
@@ -15,8 +15,8 @@ def testfunc(child):
     child.expect_exact('This test is reading out the CPUID of the platforms CPU')
     child.expect(r'CPUID_LEN: (\d+)')
     cpuid_len = int(child.match.group(1))
-    expected = 'CPUID:' + cpuid_len * r' 0x[0-9a-fA-F]{2}'
-    child.expect(expected)
+    child.expect(r'CPUID:( 0x[0-9a-fA-F]{2})+\s*$')
+    assert child.match.group(0).count(' 0x') == cpuid_len
 
 
 if __name__ == "__main__":