Update settings for proper debug output with both testing methods

tests/settings.py

+
+import sys
+
+
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
@@ -40,3 +44,15 @@ DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
 # This should normally be False for tests, but since these tests are testing
 # a tool used for development and debugging, it must be True.
 DEBUG = True
+
+
+# Suppress or show testcase debug printout, based on UnitTest execution method.
+if 'pytest' in sys.modules:
+    # Running Pytest env.
+    # Pytest only shows console output on test failure, so we want it on.
+    DJANGO_EXPANDED_TESTCASES_DEBUG_PRINT = True
+else:
+    # Running other testing env (mostly likely "django manage.py test").
+    # manage.py shows all console output always, even on success.
+    # So we want it off to avoid information overload and spam.
+    DJANGO_EXPANDED_TESTCASES_DEBUG_PRINT = False