diff --git a/tests/scripts/analyze_outcomes.py b/tests/scripts/analyze_outcomes.py
index 301bfc403..720143292 100755
--- a/tests/scripts/analyze_outcomes.py
+++ b/tests/scripts/analyze_outcomes.py
@@ -53,6 +53,11 @@ class CoverageTask(outcome_analysis.CoverageTask):
             # https://github.com/Mbed-TLS/mbedtls/issues/9581
             'Opaque key for server authentication: invalid key: decrypt with ECC key, no async',
             'Opaque key for server authentication: invalid key: ecdh with RSA key, no async',
+            # Temporary disable Handshake defragmentation tests until mbedtls
+            # pr #10011 has been merged.
+            'Handshake defragmentation on client: len=4, TLS 1.2',
+            'Handshake defragmentation on client: len=5, TLS 1.2',
+            'Handshake defragmentation on client: len=13, TLS 1.2'
         ],
         'test_suite_config.mbedtls_boolean': [
             # We never test with CBC/PKCS5/PKCS12 enabled but