diff --git a/bks-report.py b/bks-report.py
index da1ff90..45526fe 100755
--- a/bks-report.py
+++ b/bks-report.py
@@ -10,7 +10,7 @@
 
 from matplotlib import pyplot as plt
 
-from plot import plot_from_files
+from plot import plot_from_files, Case
 
 
 def fix_returncode(code):
@@ -35,7 +35,7 @@ def run_case(self, datadir, usv, rvo=None):
         os.chdir(datadir)
 
         # Get a list of old results
-        file_list = glob.glob('maneuver*.json') + glob.glob('nav-report.json')
+        file_list = glob.glob(Case.CASE_FILENAMES['maneuvers']) + glob.glob(Case.CASE_FILENAMES['analyse'])
         for filePath in file_list:
             try:
                 os.remove(filePath)
@@ -44,16 +44,16 @@ def run_case(self, datadir, usv, rvo=None):
 
         # Print the exit code.
         exec_time = time.time()
-        completedProc = subprocess.run([usv, "--target-settings", "target-settings.json",
-                                        "--targets", "target-data.json",
-                                        "--settings", "settings.json",
-                                        "--nav-data", "nav-data.json",
-                                        "--hydrometeo", "hmi-data.json",
-                                        "--constraints", "constraints.json",
-                                        "--route", "route-data.json",
-                                        "--maneuver", "maneuver.json",
-                                        "--analyse", "analyse.json",
-                                        "--predict","target-maneuvers.json",
+        completedProc = subprocess.run([usv, "--target-settings", Case.CASE_FILENAMES['target_settings'],
+                                        "--targets", Case.CASE_FILENAMES['targets_data'],
+                                        "--settings", Case.CASE_FILENAMES['settings'],
+                                        "--nav-data", Case.CASE_FILENAMES['nav_data'],
+                                        "--hydrometeo", Case.CASE_FILENAMES['hydrometeo'],
+                                        "--constraints", Case.CASE_FILENAMES['constraints'],
+                                        "--route", Case.CASE_FILENAMES['route'],
+                                        "--maneuver", Case.CASE_FILENAMES['maneuvers'],
+                                        "--analyse", Case.CASE_FILENAMES['analyse'],
+                                        "--predict", Case.CASE_FILENAMES['targets_maneuvers'],
                                         ("--rvo" if rvo is True else "--no-rvo" if rvo is False else "")],
                                        stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
         exec_time = time.time() - exec_time
diff --git a/plot.py b/plot.py
index 29a3e0a..7a7b551 100644
--- a/plot.py
+++ b/plot.py
@@ -24,15 +24,18 @@ def load_json(filename):
 
 
 def load_case_from_directory(dir_path):
-    return Case(nav_data=load_json(os.path.join(dir_path, 'nav-data.json')),
-                maneuvers=load_json(os.path.join(dir_path, 'maneuver.json')),
-                targets_data=load_json(os.path.join(dir_path, 'target-data.json')),
-                targets_maneuvers=load_json(os.path.join(dir_path, 'target-maneuvers.json')),
-                targets_real=load_json(os.path.join(dir_path, 'real-target-maneuvers.json')),
-                analyse=load_json(os.path.join(dir_path, 'analyse.json')),
-                constraints=load_json(os.path.join(dir_path, 'constraints.json')),
-                route=load_json(os.path.join(dir_path, 'route-data.json')),
-                settings=load_json(os.path.join(dir_path, 'settings.json')))
+    def load_file(dataname):
+        return load_json(os.path.join(dir_path, Case.CASE_FILENAMES[dataname]))
+
+    return Case(nav_data=load_file('nav_data'),
+                maneuvers=load_file('maneuvers'),
+                targets_data=load_file('targets_data'),
+                targets_maneuvers=load_file('targets_maneuvers'),
+                targets_real=load_file('targets_real'),
+                analyse=load_file('analyse'),
+                constraints=load_file('constraints'),
+                route=load_file('route'),
+                settings=load_file('settings'))
 
 
 def path_time(path):
@@ -40,6 +43,18 @@ def path_time(path):
 
 
 class Case:
+    CASE_FILENAMES = {'nav_data': 'nav-data.json',
+                      'maneuvers': 'maneuver.json',
+                      'targets_data': 'target-data.json',
+                      'target_settings': 'target-settings.json',
+                      'targets_maneuvers': 'target-maneuvers.json',
+                      'targets_real': 'real-target-maneuvers.json',
+                      'analyse': 'nav-report.json',
+                      'constraints': 'constraints.json',
+                      'route': 'route-data.json',
+                      'settings': 'settings.json',
+                      'hydrometeo': 'hmi-data.json'}
+
     def __init__(self, nav_data=None, maneuvers=None, targets_data=None, targets_maneuvers=None, targets_real=None,
                  analyse=None, constraints=None, route=None, settings=None):
         self.nav_data = nav_data