diff --git a/.coveragerc b/.coveragerc
index 90c8c7c4..04df1ec9 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,5 +1,5 @@
 [run]
 include = contact/*, content/*, glossary/*, message/*, photograph/*, quiz/*, slideshow/*
-omit = *migrations*, */tests/*, .*, *config*, manage.py, some/, dist/, sample_project/
+omit = *migrations*, */tests/*, .*, *config*, manage.py, some/, dist/, sample_project/*, cov_html/*
 plugins =
     django_coverage_plugin
diff --git a/.travis.yml b/.travis.yml
index 5a1f4f17..f3cc0c71 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,8 +20,9 @@ jobs:
     - stage: "Unit tests and linting"
       name: "Unit tests with Python 3.7"
       before_script:
-        - psql -c "CREATE DATABASE test_db_app;" -U postgres
-        - psql -c "CREATE USER db_user WITH PASSWORD 'db_pass';" -U postgres
+        - psql -c "CREATE DATABASE local_db;" -U postgres
+        - psql -c "CREATE USER localuser WITH PASSWORD 'localpass';" -U postgres
+        - psql -c "ALTER USER localuser CREATEDB;"
       script: make ci
       after_success: codecov
     - name: "Formatting with black"
diff --git a/sample_project/sample_project/settings.py b/sample_project/sample_project/settings.py
index 1fe43a83..ae7ffbe6 100644
--- a/sample_project/sample_project/settings.py
+++ b/sample_project/sample_project/settings.py
@@ -129,6 +129,12 @@
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/3.0/howto/static-files/
 
+# See: https://docs.djangoproject.com/en/dev/ref/settings/#media-root
+MEDIA_ROOT = "./media"
+
+# See: https://docs.djangoproject.com/en/dev/ref/settings/#media-url
+MEDIA_URL = "/media/"
+
 STATIC_URL = "/static/"
 
 PROFILES_SERIALIZER_MODULE, PROFILES_SERIALIZER = (
diff --git a/solid_backend/photograph/forms.py b/solid_backend/photograph/forms.py
index e2ea8427..b9fb2f6d 100644
--- a/solid_backend/photograph/forms.py
+++ b/solid_backend/photograph/forms.py
@@ -1,8 +1,6 @@
 from django import forms
 from mutagen import File
 
-from .models import Photograph
-
 
 class PhotographForm(forms.ModelForm):
     """
@@ -41,7 +39,7 @@ def save(self, commit=True):
         pixel_number = self.cleaned_data.get("pixel_number")
 
         instance = super(PhotographForm, self).save(commit=False)
-
+        print(instance.audio)
         if length_value and pixel_number:
             instance.img_original_scale = length_value * length_unit / pixel_number
 
diff --git a/solid_backend/photograph/tests/conftest_files/100x100_test_img.jpg b/solid_backend/photograph/tests/conftest_files/100x100_test_img.jpg
new file mode 100644
index 00000000..f8be98d1
Binary files /dev/null and b/solid_backend/photograph/tests/conftest_files/100x100_test_img.jpg differ
diff --git a/solid_backend/photograph/tests/conftest_files/general_conftest.py b/solid_backend/photograph/tests/conftest_files/general_conftest.py
index b4cb7f8f..b77f2dd0 100644
--- a/solid_backend/photograph/tests/conftest_files/general_conftest.py
+++ b/solid_backend/photograph/tests/conftest_files/general_conftest.py
@@ -1,8 +1,63 @@
 import pytest
+from django.contrib.admin.sites import AdminSite
+from django.core.files.uploadedfile import SimpleUploadedFile
 
+from solid_backend.photograph.admin import PhotographAdmin
 from solid_backend.photograph.models import Photograph
 
+CURRENT_RELATIVE_PATH = "solid_backend/photograph/tests/conftest_files/"
+test_img_filename = "{}100x100_test_img.jpg".format(CURRENT_RELATIVE_PATH)
+test_audio_filename = "{}test_mp3_file.mp3".format(CURRENT_RELATIVE_PATH)
+
 
 @pytest.fixture
 def photograph_model_class():
     return Photograph
+
+
+@pytest.fixture
+def photograph_admin_form():
+    return PhotographAdmin(Photograph, AdminSite()).get_form(request=None)
+
+
+@pytest.fixture
+def valid_photograph_data():
+    data = {
+        "length_value": 5.0,  # 5 cm
+        "length_unit": 0.01,  # cm
+        "pixel_number": 100,  # per 100 pixel
+        "img_alt": "Alternative text to describe the image.",
+    }
+    return data
+
+
+@pytest.fixture
+def valid_photograph_files():
+    files = {
+        "img": SimpleUploadedFile(
+            test_img_filename, open(test_img_filename, "rb").read()
+        ),
+        "audio": SimpleUploadedFile(
+            test_audio_filename, open(test_audio_filename, "rb").read()
+        ),
+    }
+    return files
+
+
+@pytest.fixture
+def valid_img():
+    return {
+        "img": SimpleUploadedFile(
+            test_img_filename, open(test_img_filename, "rb").read()
+        )
+    }
+
+
+@pytest.fixture
+def photograph_object(
+    photograph_admin_form, valid_photograph_data, valid_photograph_files
+):
+    form = photograph_admin_form(valid_photograph_data, valid_photograph_files)
+    form.is_valid()
+    instance = form.save()
+    return instance
diff --git a/solid_backend/photograph/tests/conftest_files/test_mp3_file.mp3 b/solid_backend/photograph/tests/conftest_files/test_mp3_file.mp3
new file mode 100644
index 00000000..8bbda403
Binary files /dev/null and b/solid_backend/photograph/tests/conftest_files/test_mp3_file.mp3 differ
diff --git a/solid_backend/photograph/tests/test_forms.py b/solid_backend/photograph/tests/test_forms.py
new file mode 100644
index 00000000..dfaeb3fb
--- /dev/null
+++ b/solid_backend/photograph/tests/test_forms.py
@@ -0,0 +1,66 @@
+import pytest
+from django import forms
+
+
+class TestPhotographModelForm:
+    def test_photograph_admin_form_exists(self):
+        from solid_backend.photograph.forms import PhotographForm
+
+    def test_form_has_length_value_field(self, photograph_admin_form):
+        field = photograph_admin_form.base_fields.get("length_value")
+        assert field
+        assert isinstance(field, forms.FloatField)
+
+    def test_form_has_length_unit_field(self, photograph_admin_form):
+        field = photograph_admin_form.base_fields.get("length_unit")
+        assert field
+        assert isinstance(field, forms.TypedChoiceField)
+
+    def test_form_has_pixel_number_field(self, photograph_admin_form):
+        field = photograph_admin_form.base_fields.get("pixel_number")
+        assert field
+        assert isinstance(field, forms.IntegerField)
+
+    def test_form_has_unit_choices(self, photograph_admin_form):
+        assert hasattr(photograph_admin_form, "LENGTH_UNIT_CHOICES")
+
+        choices = [
+            (1.00, "m"),
+            (0.01, "cm"),
+            (0.001, "mm"),
+        ]
+
+        assert photograph_admin_form.LENGTH_UNIT_CHOICES == choices
+
+    @pytest.mark.django_db
+    def test_audio_file_duration(self, photograph_object):
+        assert photograph_object.audio_duration == 2.0
+
+    @pytest.mark.django_db
+    def test_scale_factor_calculation(self, photograph_object):
+        assert photograph_object.img_original_scale == 5e-4
+
+    @pytest.mark.django_db
+    def test_delete_scale_factor(
+        self, valid_photograph_data, photograph_object, photograph_admin_form
+    ):
+        valid_photograph_data["pixel_number"] = 0
+        form = photograph_admin_form(valid_photograph_data, instance=photograph_object)
+        form.is_valid()
+        instance = form.save()
+
+        assert instance.img_original_scale is None
+
+    @pytest.mark.django_db
+    def test_audio_duration_without_file(
+        self, photograph_object, valid_photograph_data, valid_img, photograph_admin_form
+    ):
+
+        form = photograph_admin_form(
+            valid_photograph_data, files={"audio": False}, instance=photograph_object
+        )
+        form.is_valid()
+        instance = form.save()
+
+        assert not instance.audio
+        assert instance.audio_duration is None
diff --git a/test_settings.py b/test_settings.py
index 1348dc63..44d58f95 100644
--- a/test_settings.py
+++ b/test_settings.py
@@ -33,8 +33,9 @@
     "solid_backend.message.apps.MessageConfig",
     "solid_backend.slideshow.apps.SlideshowConfig",
     "solid_backend.photograph.apps.PhotographConfig",
-    "django_cleanup.apps.CleanupConfig",  # Should be placed last!
     "django_extensions",
+    "django_cleanup.apps.CleanupConfig",  # Should be placed last!
+
 ]
 
 MIDDLEWARE = [
@@ -71,10 +72,14 @@
 # ------------------------------------------------------------------------------
 # See: https://docs.djangoproject.com/en/dev/ref/settings/#databases
 DATABASES = {
-    # Raises ImproperlyConfigured exception if DATABASE_URL not in os.environ
-    "default": env.db(
-        "DATABASE_URL", default="postgres://postgres@localhost:5432/postgres"
-    ),
+    "default": {
+        "ENGINE": "django.db.backends.postgresql_psycopg2",
+        "NAME": "local_db",
+        "USER": "localuser",
+        "PASSWORD": "localpass",
+        "HOST": "localhost",
+        "PORT": "",
+    }
 }
 DATABASES["default"]["ATOMIC_REQUESTS"] = True
 
@@ -106,7 +111,7 @@
 # MEDIA CONFIGURATION
 # ------------------------------------------------------------------------------
 # See: https://docs.djangoproject.com/en/dev/ref/settings/#media-root
-MEDIA_ROOT = "/media"
+MEDIA_ROOT = "./media"
 
 # See: https://docs.djangoproject.com/en/dev/ref/settings/#media-url
 MEDIA_URL = "/media/"