diff --git a/src/tee/admin.py b/src/tee/admin.py
index e83b35d1c..84fc1ab4e 100644
--- a/src/tee/admin.py
+++ b/src/tee/admin.py
@@ -19,8 +19,7 @@ class LogAdmin(admin.ModelAdmin):
     readonly_fields = [
         "started_on",
         "finished_on",
-        "exit_code",
-        "exit_value",
+        "finished_successfully",
         "command_name",
         "args",
         "stdout",
diff --git a/src/tee/const.py b/src/tee/const.py
new file mode 100644
index 000000000..117fca932
--- /dev/null
+++ b/src/tee/const.py
@@ -0,0 +1 @@
+DONT_CALL = "Used by django_tee tests. Don't call, does nothing. "
diff --git a/src/tee/core.py b/src/tee/core.py
index 5bdc08406..42a76f0fa 100644
--- a/src/tee/core.py
+++ b/src/tee/core.py
@@ -2,7 +2,6 @@
 import traceback
 from contextlib import redirect_stderr, redirect_stdout
 
-import simplejson
 from django.core.management import ManagementUtility
 
 from tee.models import Log
@@ -21,37 +20,21 @@ def execute(argv, **kwargs):
     stdout = TeeIO(kwargs.get("stdout") if "stdout" in kwargs else sys.stdout)
     stderr = TeeIO(kwargs.get("stderr") if "stderr" in kwargs else sys.stdout)
 
-    log = Log.objects.create(command_name=argv[1], args=argv[2:])
-    res = 127
+    log = Log.objects.create(command_name=argv[0], args=argv[1:])
+
     try:
         with redirect_stderr(stderr):
             with redirect_stdout(stdout):
                 try:
                     utility = ManagementUtility(argv)
                     utility.execute()
+                    log.finished_successfully = True
                 except Exception:
-                    res = 1
+                    log.finished_successfully = False
                     log.traceback = traceback.format_exc(limit=65535)
 
     finally:
         log.stdout = stdout.getvalue()
         log.stderr = stderr.getvalue()
         log.finished_on = timezone.now()
-
-        if res is None:
-            log.exit_code = 0
-        elif isinstance(res, int):
-            log.exit_code = res
-        else:
-            log.exit_code = -1
-
-            # if the return value is json-encodeable, save it to db:
-            try:
-                simplejson.dumps(res)
-                log.exit_value = res
-            except TypeError:
-                log.exit_value = (
-                    "Unable to encode results as JSON, thus unable to store it "
-                    "in the database. Repr: %r" % res
-                )
         log.save()
diff --git a/src/tee/management/commands/tee.py b/src/tee/management/commands/tee.py
index 0864a05f2..924ffd167 100644
--- a/src/tee/management/commands/tee.py
+++ b/src/tee/management/commands/tee.py
@@ -11,5 +11,12 @@ def add_arguments(self, parser):
         parser.add_argument("otherthings", nargs="*")  # parser.add
 
     def handle(self, command_name, otherthings, *args, **options):
-        new_argv = [sys.argv[0]] + sys.argv[2:]
-        core.execute(new_argv)
+        new_argv = [sys.argv[0], command_name] + otherthings
+
+        kwargs = {}
+
+        for elem in ["stdout", "stderr"]:
+            if options.get(elem):
+                kwargs[elem] = options.get(elem)
+
+        core.execute(new_argv, **kwargs)
diff --git a/src/tee/management/commands/tee_test_exception.py b/src/tee/management/commands/tee_test_exception.py
index 2d06282b6..66e452ba9 100644
--- a/src/tee/management/commands/tee_test_exception.py
+++ b/src/tee/management/commands/tee_test_exception.py
@@ -1,7 +1,11 @@
 from django.core.management import BaseCommand
 
+from tee import const
+
 
 class Command(BaseCommand):
+    help = const.DONT_CALL
+
     def handle(self, *args, **options):
 
         self.stderr.write("wrote to stderr")
diff --git a/src/tee/management/commands/tee_test_okay.py b/src/tee/management/commands/tee_test_okay.py
index be0f8ecd1..5efd6c1c8 100644
--- a/src/tee/management/commands/tee_test_okay.py
+++ b/src/tee/management/commands/tee_test_okay.py
@@ -1,7 +1,11 @@
 from django.core.management import BaseCommand
 
+from tee import const
+
 
 class Command(BaseCommand):
+    help = const.DONT_CALL
+
     def handle(self, *args, **options):
 
         self.stderr.write("wrote to stderr")
diff --git a/src/tee/management/commands/tee_test_result.py b/src/tee/management/commands/tee_test_result.py
deleted file mode 100644
index c87e9f961..000000000
--- a/src/tee/management/commands/tee_test_result.py
+++ /dev/null
@@ -1,6 +0,0 @@
-from django.core.management import BaseCommand
-
-
-class Command(BaseCommand):
-    def handle(self, *args, **options):
-        return complex()
diff --git a/src/tee/migrations/0004_auto_20220109_0151.py b/src/tee/migrations/0004_auto_20220109_0151.py
new file mode 100644
index 000000000..0873c249e
--- /dev/null
+++ b/src/tee/migrations/0004_auto_20220109_0151.py
@@ -0,0 +1,30 @@
+# Generated by Django 3.0.14 on 2022-01-09 00:51
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("tee", "0003_log_traceback"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="log",
+            name="exit_code",
+        ),
+        migrations.RemoveField(
+            model_name="log",
+            name="exit_value",
+        ),
+        migrations.RemoveField(
+            model_name="log",
+            name="kwargs",
+        ),
+        migrations.AddField(
+            model_name="log",
+            name="finished_successfully",
+            field=models.NullBooleanField(),
+        ),
+    ]
diff --git a/src/tee/models.py b/src/tee/models.py
index 09fc329a8..1a45ee3a1 100644
--- a/src/tee/models.py
+++ b/src/tee/models.py
@@ -6,21 +6,7 @@
 class Log(models.Model):
     started_on = models.DateTimeField(auto_now_add=True)
     finished_on = models.DateTimeField(blank=True, null=True)
-
-    exit_code = models.SmallIntegerField(
-        blank=True,
-        null=True,
-        help_text="""If value returned by
-    django.core.management.call_command is None, this will be zero. If value returned by d.c.m.call_command
-    is an int, this will be that int. If different, this is set to -1 and exit_value field is set. """,
-    )
-
-    exit_value = JSONField(
-        blank=True,
-        null=True,
-        help_text="""JSON-encoded value, returned by
-    django.core.management.call_command function, if different than None or an int. """,
-    )
+    finished_successfully = models.NullBooleanField()
 
     command_name = models.TextField()
     args = JSONField(blank=True, null=True)
diff --git a/src/tee/tests.py b/src/tee/tests.py
index c3618986c..0b872b047 100644
--- a/src/tee/tests.py
+++ b/src/tee/tests.py
@@ -17,20 +17,18 @@ def stderr():
 
 
 @pytest.mark.django_db
-def test_tee_okay(stdout: StringIO, stderr: StringIO):
-    call_command("tee", "tee_test_okay", stdout=stdout, stderr=stderr)
-    assert Log.objects.first().exit_code == 0
+def test_tee_okay(stdout: StringIO, stderr: StringIO, mocker):
+    with mocker.patch("django.db.connections.close_all"):
+        # patch wymagany, bo BaseCommand wywołuje close_all
+        call_command("tee", "tee_test_okay", stdout=stdout, stderr=stderr)
+    assert Log.objects.first().finished_successfully
     assert "Used print()" in stdout.getvalue()
     assert "Used print()" in stderr.getvalue()
 
 
 @pytest.mark.django_db
-def test_tee_exception(stdout, stderr):
-    call_command("tee", "tee_test_exception", stdout=stdout, stderr=stderr)
+def test_tee_exception(stdout, stderr, mocker):
+    with mocker.patch("django.db.connections.close_all"):
+        # patch wymagany, bo BaseCommand wywołuje close_all
+        call_command("tee", "tee_test_exception", stdout=stdout, stderr=stderr)
     assert Log.objects.first().traceback
-
-
-@pytest.mark.django_db
-def test_tee_result(stdout, stderr):
-    call_command("tee", "tee_test_result", stdout=stdout, stderr=stderr)
-    assert "Unable to encode" in Log.objects.first().exit_value