diff --git a/scripts/mbedtls_dev/psa_information.py b/scripts/mbedtls_dev/psa_information.py
index 7f38465..0e68df0 100644
--- a/scripts/mbedtls_dev/psa_information.py
+++ b/scripts/mbedtls_dev/psa_information.py
@@ -54,11 +54,13 @@
     used.difference_update(SYMBOLS_WITHOUT_DEPENDENCY)
     return sorted(psa_want_symbol(name) for name in used)
 
-# A temporary hack: at the time of writing, not all dependency symbols
-# are implemented yet. Skip test cases for which the dependency symbols are
-# not available. Once all dependency symbols are available, this hack must
-# be removed so that a bug in the dependency symbols properly leads to a test
-# failure.
+# Skip test cases for which the dependency symbols are not defined.
+# We assume that this means that a required mechanism is not implemented.
+# Note that if we erroneously skip generating test cases for
+# mechanisms that are not implemented, this should be caught
+# by the NOT_SUPPORTED test cases generated by generate_psa_tests.py
+# in test_suite_psa_crypto_not_supported and test_suite_psa_crypto_op_fail:
+# those emit negative tests, which will not be skipped here.
 def read_implemented_dependencies(filename: str) -> FrozenSet[str]:
     return frozenset(symbol
                      for line in open(filename)
@@ -73,7 +75,6 @@
         _implemented_dependencies = _implemented_dependencies.union(
             read_implemented_dependencies('include/mbedtls/config_psa.h'))
     for dep in dependencies:
-        dep = dep.lstrip('!')
         if dep.startswith('PSA_WANT') and dep not in _implemented_dependencies:
             dependencies.append('DEPENDENCY_NOT_IMPLEMENTED_YET_' + dep)
     dependencies.sort()