diff --git a/soitool/codebook.py b/soitool/codebook.py
index 84c3ccfcbcfaa12d3e605b55aa7f82eed97c5132..5c783b0c698a73b74edd26e71096994eda14968c 100644
--- a/soitool/codebook.py
+++ b/soitool/codebook.py
@@ -22,6 +22,7 @@ class CodeBookTableView(QTableView):
 
     Parameter 'database' should be an instance of soitool.database.Database,
     and is used to create a QSqlDatabase from the database-file.
+
     Raises RuntimeError if database does not open.
     """
 
diff --git a/soitool/codebook_to_pdf.py b/soitool/codebook_to_pdf.py
index 0fe35b87c2f5c31400432166fc17402975f2e95d..991b105c9eb147f4f2f6b5d35871be02b73a1a9d 100644
--- a/soitool/codebook_to_pdf.py
+++ b/soitool/codebook_to_pdf.py
@@ -60,7 +60,7 @@ def generate_codebook_pdf(
     Parameters
     ----------
     database : soitool.database.Database
-        Reference to database-instance
+        Reference to database-instance.
     small : bool, optional
         Data is from full codebook if False (default),
         from small codebook if True.
@@ -139,7 +139,7 @@ def get_codebook_data(database, small=False):
     Parameters
     ----------
     database : soitool.database.Database
-        Reference to database-instance
+        Reference to database-instance.
     small : bool
         Retrieves full codebook if False (default), small codebook if True.
 
diff --git a/soitool/database.py b/soitool/database.py
index 8814aef0d69db18be92b59f012b8e761ca073848..75d19fc2ff3be752f89af441c289daeca95315f1 100644
--- a/soitool/database.py
+++ b/soitool/database.py
@@ -6,7 +6,7 @@ from datetime import datetime
 import soitool.coder
 from soitool.enumerates import CodebookSort
 
-# Set name and path to default (, future) database
+# Set name and path to default (future) database
 DBNAME = "database"
 CURDIR = os.path.dirname(__file__)
 DBPATH = os.path.join(CURDIR, DBNAME)
@@ -33,9 +33,9 @@ LASTUPDATED = "CREATE TABLE LastUpdated(Timestamp DATETIME PRIMARY KEY)"
 class Database:
     """Holds database-connection and related functions.
 
-    Connects to existing db if found, creates new db if not.
+    Uses default database unless parameter 'db_path', path to a database-file,
+    is given. Connects to existing db if found, creates new db if not.
     If db is created, tables are created and filled.
-    Uses default database unless parameter 'db_path' is given.
 
     Holds a QTimer that requests an update of CodeBook on every timeout.
     """
diff --git a/test/test_codebook_to_pdf.py b/test/test_codebook_to_pdf.py
index fa553e016cba32106e2803c48c3455efc166fc98..0839d33b1bf88c7f34815ed0a72af47e521dfcf3 100644
--- a/test/test_codebook_to_pdf.py
+++ b/test/test_codebook_to_pdf.py
@@ -6,7 +6,10 @@ from pathlib import Path
 from datetime import datetime
 from soitool import codebook_to_pdf
 from soitool.database import Database
-from test.test_database import TESTDBPATH
+
+TESTDBNAME = "testDatabase"
+SOITOOL_DIR = Path(__file__).parent.parent / "soitool"
+TESTDBPATH = os.path.join(SOITOOL_DIR, TESTDBNAME)
 
 SOITOOL_ROOT_PATH = Path(__file__).parent.parent