diff --git a/borgmatic/execute.py b/borgmatic/execute.py
index f775b2f..4b791b9 100644
--- a/borgmatic/execute.py
+++ b/borgmatic/execute.py
@@ -79,7 +79,11 @@ def execute_command(
 
     Raise subprocesses.CalledProcessError if an error occurs while running the command.
     '''
-    logger.debug(' '.join(full_command))
+    logger.debug(
+        ' '.join(full_command)
+        + (' < {}'.format(input_file.name) if input_file else '')
+        + (' > {}'.format(output_file.name) if output_file else '')
+    )
     environment = {**os.environ, **extra_environment} if extra_environment else None
 
     if output_log_level is None:
diff --git a/tests/unit/hooks/test_mysql.py b/tests/unit/hooks/test_mysql.py
index 354be73..c134413 100644
--- a/tests/unit/hooks/test_mysql.py
+++ b/tests/unit/hooks/test_mysql.py
@@ -116,3 +116,90 @@ def test_dump_databases_runs_mysqldump_for_all_databases():
     ).once()
 
     module.dump_databases(databases, 'test.yaml', dry_run=False)
+
+
+def test_make_database_dump_patterns_converts_names_to_glob_paths():
+    flexmock(module.dump).should_receive('make_database_dump_filename').and_return(
+        'databases/*/foo'
+    ).and_return('databases/*/bar')
+
+    assert module.make_database_dump_patterns(flexmock(), flexmock(), ('foo', 'bar')) == [
+        'databases/*/foo',
+        'databases/*/bar',
+    ]
+
+
+def test_make_database_dump_patterns_treats_empty_names_as_matching_all_databases():
+    flexmock(module.dump).should_receive('make_database_dump_filename').with_args(
+        module.DUMP_PATH, '*', '*'
+    ).and_return('databases/*/*')
+
+    assert module.make_database_dump_patterns(flexmock(), flexmock(), ()) == ['databases/*/*']
+
+
+def test_restore_database_dumps_restores_each_database():
+    databases = [{'name': 'foo'}, {'name': 'bar'}]
+    flexmock(module.dump).should_receive('make_database_dump_filename').and_return(
+        'databases/localhost/foo'
+    ).and_return('databases/localhost/bar')
+
+    for name in ('foo', 'bar'):
+        dump_filename = 'databases/localhost/{}'.format(name)
+        input_file = flexmock()
+        flexmock(sys.modules['builtins']).should_receive('open').with_args(
+            dump_filename
+        ).and_return(input_file)
+        flexmock(module).should_receive('execute_command').with_args(
+            ('mysql', '--batch'), input_file=input_file, extra_environment=None
+        ).once()
+
+    module.restore_database_dumps(databases, 'test.yaml', dry_run=False)
+
+
+def test_restore_database_dumps_runs_mysql_with_hostname_and_port():
+    databases = [{'name': 'foo', 'hostname': 'database.example.org', 'port': 5433}]
+    flexmock(module.dump).should_receive('make_database_dump_filename').and_return(
+        'databases/localhost/foo'
+    )
+    dump_filename = 'databases/localhost/foo'
+    input_file = flexmock()
+    flexmock(sys.modules['builtins']).should_receive('open').with_args(dump_filename).and_return(
+        input_file
+    )
+
+    flexmock(module).should_receive('execute_command').with_args(
+        (
+            'mysql',
+            '--batch',
+            '--host',
+            'database.example.org',
+            '--port',
+            '5433',
+            '--protocol',
+            'tcp',
+        ),
+        input_file=input_file,
+        extra_environment=None,
+    ).once()
+
+    module.restore_database_dumps(databases, 'test.yaml', dry_run=False)
+
+
+def test_restore_database_dumps_runs_mysql_with_username_and_password():
+    databases = [{'name': 'foo', 'username': 'root', 'password': 'trustsome1'}]
+    flexmock(module.dump).should_receive('make_database_dump_filename').and_return(
+        'databases/localhost/foo'
+    )
+    dump_filename = 'databases/localhost/foo'
+    input_file = flexmock()
+    flexmock(sys.modules['builtins']).should_receive('open').with_args(dump_filename).and_return(
+        input_file
+    )
+
+    flexmock(module).should_receive('execute_command').with_args(
+        ('mysql', '--batch', '--user', 'root'),
+        input_file=input_file,
+        extra_environment={'MYSQL_PWD': 'trustsome1'},
+    ).once()
+
+    module.restore_database_dumps(databases, 'test.yaml', dry_run=False)
diff --git a/tests/unit/hooks/test_postgresql.py b/tests/unit/hooks/test_postgresql.py
index 8ff58e9..470a63e 100644
--- a/tests/unit/hooks/test_postgresql.py
+++ b/tests/unit/hooks/test_postgresql.py
@@ -208,7 +208,7 @@ def test_restore_database_dumps_runs_pg_restore_with_hostname_and_port():
     databases = [{'name': 'foo', 'hostname': 'database.example.org', 'port': 5433}]
     flexmock(module.dump).should_receive('make_database_dump_filename').and_return(
         'databases/localhost/foo'
-    ).and_return('databases/localhost/bar')
+    )
 
     flexmock(module).should_receive('execute_command').with_args(
         (
@@ -251,7 +251,7 @@ def test_restore_database_dumps_runs_pg_restore_with_username_and_password():
     databases = [{'name': 'foo', 'username': 'postgres', 'password': 'trustsome1'}]
     flexmock(module.dump).should_receive('make_database_dump_filename').and_return(
         'databases/localhost/foo'
-    ).and_return('databases/localhost/bar')
+    )
 
     flexmock(module).should_receive('execute_command').with_args(
         (
diff --git a/tests/unit/test_execute.py b/tests/unit/test_execute.py
index cae54c5..f29feb5 100644
--- a/tests/unit/test_execute.py
+++ b/tests/unit/test_execute.py
@@ -63,7 +63,7 @@ def test_execute_command_calls_full_command():
 
 def test_execute_command_calls_full_command_with_output_file():
     full_command = ['foo', 'bar']
-    output_file = flexmock()
+    output_file = flexmock(name='test')
     flexmock(module.os, environ={'a': 'b'})
     flexmock(module.subprocess).should_receive('Popen').with_args(
         full_command,
@@ -83,7 +83,7 @@ def test_execute_command_calls_full_command_with_output_file():
 
 def test_execute_command_calls_full_command_with_input_file():
     full_command = ['foo', 'bar']
-    input_file = flexmock()
+    input_file = flexmock(name='test')
     flexmock(module.os, environ={'a': 'b'})
     flexmock(module.subprocess).should_receive('Popen').with_args(
         full_command,