diff --git a/safety/cli.py b/safety/cli.py
index 41130e1c..1d36db9e 100644
--- a/safety/cli.py
+++ b/safety/cli.py
@@ -46,6 +46,11 @@ def cli(ctx, debug, telemetry, disable_optional_telemetry_data):
 
     LOG.info(f'Telemetry enabled: {ctx.telemetry}')
 
+    @ctx.call_on_close
+    def clean_up_on_close():
+        LOG.debug('Calling clean up on close function.')
+        safety.close_session()
+
 
 @cli.command()
 @click.option("--key", default="", envvar="SAFETY_API_KEY",
@@ -278,7 +283,8 @@ def license(ctx, key, db, output, cache, files, proxyprotocol, proxyhost, proxyp
     licenses_db = {}
 
     try:
-        licenses_db = safety.get_licenses(key, db, cache, proxy_dictionary, telemetry=ctx.parent.telemetry)
+        licenses_db = safety.get_licenses(key=key, db_mirror=db, cached=cache, proxy=proxy_dictionary,
+                                          telemetry=ctx.parent.telemetry)
     except SafetyError as e:
         LOG.exception('Expected SafetyError happened: %s', e)
         output_exception(e, exit_code_output=False)
@@ -367,5 +373,6 @@ def validate(ctx, name, path):
 
 cli.add_command(alert)
 
+
 if __name__ == "__main__":
     cli()
diff --git a/safety/output_utils.py b/safety/output_utils.py
index 529860ff..78e7abd4 100644
--- a/safety/output_utils.py
+++ b/safety/output_utils.py
@@ -495,18 +495,16 @@ def build_using_sentence(key, db):
         key_sentence = [{'style': True, 'value': 'an API KEY'},
                         {'style': False, 'value': ' and the '}]
         db_name = 'PyUp Commercial'
-    elif db and custom_integration and is_a_remote_mirror(db):
-        return []
+    elif db:
+        if is_a_remote_mirror(db):
+            if custom_integration:
+                return []
+            db_name = f"remote URL {db}"
+        else:
+            db_name = f"local file {db}"
     else:
         db_name = 'non-commercial'
 
-    if db:
-        db_type = 'local file'
-        if is_a_remote_mirror(db):
-            db_type = 'remote URL'
-
-        db_name = f"{db_type} {db}"
-
     database_sentence = [{'style': True, 'value': db_name + ' database'}]
 
     return [{'style': False, 'value': 'Using '}] + key_sentence + database_sentence
diff --git a/safety/safety.py b/safety/safety.py
index 67a2b414..b07d7666 100644
--- a/safety/safety.py
+++ b/safety/safety.py
@@ -208,10 +208,12 @@ def fetch_database_file(path, db_name):
 
 
 def fetch_database(full=False, key=False, db=False, cached=0, proxy=None, telemetry=True):
-    if db:
+    if key:
+        mirrors = API_MIRRORS
+    elif db:
         mirrors = [db]
     else:
-        mirrors = API_MIRRORS if key else OPEN_MIRRORS
+        mirrors = OPEN_MIRRORS
 
     db_name = "insecure_full.json" if full else "insecure.json"
     for mirror in mirrors:
@@ -346,7 +348,7 @@ def check(packages, key=False, db_mirror=False, cached=0, ignore_vulns=None, ign
 
                         ignore_vuln_if_needed(vuln_id, cve, ignore_vulns, ignore_severity_rules)
 
-                        vulnerability = get_vulnerability_from(vuln_id, cve, data, specifier, db, name, pkg,
+                        vulnerability = get_vulnerability_from(vuln_id, cve, data, specifier, db_full, name, pkg,
                                                                ignore_vulns)
 
                         should_add_vuln = not (vulnerability.is_transitive and is_env_scan)
@@ -608,3 +610,8 @@ def read_vulnerabilities(fh):
         raise MalformedDatabase(reason=e, fetched_from=fh.name)
 
     return data
+
+
+def close_session():
+    LOG.debug('Closing requests session.')
+    session.close()
diff --git a/safety/util.py b/safety/util.py
index 5af070b3..b24b7f69 100644
--- a/safety/util.py
+++ b/safety/util.py
@@ -388,11 +388,13 @@ def __init__(
         mode: str = "r",
         encoding: str = None,
         errors: str = "strict",
+        pure: bool = os.environ.get('SAFETY_PURE_YAML', 'false').lower() == 'true'
     ) -> None:
         self.mode = mode
         self.encoding = encoding
         self.errors = errors
         self.basic_msg = '\n' + click.style('Unable to load the Safety Policy file "{name}".', fg='red')
+        self.pure = pure
 
     def to_info_dict(self):
         info_dict = super().to_info_dict()
@@ -429,16 +431,17 @@ def convert(self, value, param, ctx):
 
             msg = self.basic_msg.format(name=value) + '\n' + click.style('HINT:', fg='yellow') + ' {hint}'
 
-            f, should_close = click.types.open_stream(
+            f, _ = click.types.open_stream(
                 value, self.mode, self.encoding, self.errors, atomic=False
             )
             filename = ''
 
             try:
                 raw = f.read()
-                yaml = YAML(typ='safe', pure=False)
+                yaml = YAML(typ='safe', pure=self.pure)
                 safety_policy = yaml.load(raw)
                 filename = f.name
+                f.close()
             except Exception as e:
                 show_parsed_hint = isinstance(e, MarkedYAMLError)
                 hint = str(e)