diff --git a/tools/test.py b/tools/test.py
index 56eaddb02c..c9b897dc05 100644
--- a/tools/test.py
+++ b/tools/test.py
@@ -261,9 +261,11 @@ def main():
                 library_build_success = True
             except ToolException as e:
                 # ToolException output is handled by the build log
+                print("ERROR: " + str(e))
                 pass
             except NotSupportedException as e:
                 # NotSupportedException is handled by the build log
+                print("ERROR: " + str(e))
                 pass
             except Exception as e:
                 if options.verbose:
diff --git a/tools/test/toolchains/test_toolchains.py b/tools/test/toolchains/test_toolchains.py
index d7877a74d8..8d23b12ee4 100644
--- a/tools/test/toolchains/test_toolchains.py
+++ b/tools/test/toolchains/test_toolchains.py
@@ -195,7 +195,6 @@ class TestIarToolchain(TestCase):
         """Test that an exception is raised if the std C library is not supported for a target on the IAR toolchain."""
         mock_target = mock.MagicMock()
         mock_target.core = "Cortex-M4"
-        mock_target.microlib_supported = False
         mock_target.default_lib = "std"
         mock_target.supported_c_libs = {"iar": ["small"]}
         mock_target.supported_toolchains = ["IAR"]
@@ -206,7 +205,6 @@ class TestIarToolchain(TestCase):
         """Test that an exception is raised if the small C library is not supported for a target on the IAR toolchain."""
         mock_target = mock.MagicMock()
         mock_target.core = "Cortex-M4"
-        mock_target.microlib_supported = False
         mock_target.default_lib = "small"
         mock_target.supported_c_libs = {"iar": ["std"]}
         mock_target.supported_toolchains = ["IAR"]