diff --git a/plantuml-mode.el b/plantuml-mode.el
index 13b5706..caa978c 100644
--- a/plantuml-mode.el
+++ b/plantuml-mode.el
@@ -623,7 +623,7 @@ or it is followed by line end.")
       (defvar plantuml-indent-regexp-newif-end "^\s*\\(endif\\|elseif\\|else\\)\s*.*$")
       (defvar plantuml-indent-regexp-loop-end "^\s*\\(repeat\s*while\\|endwhile\\)\s*.*$")
       (defvar plantuml-indent-regexp-fork-end "^\s*\\(\\(fork\\|split\\)\s+again\\|end\s+\\(fork\\|split\\)\\)\s*$")
-      (defvar plantuml-indent-regexp-case-end "^\s*\\(case\s-*([^)]*)\\|endswitch\\)\s*\\('.*\\)?$")
+      (defvar plantuml-indent-regexp-case-end "^\s*\\(case\s-*(.*)\\|endswitch\\)\s*\\('.*\\)?$")
       (defvar plantuml-indent-regexp-macro-end "^\s*!enddefinelong\s*\\('.*\\)?$")
       (defvar plantuml-indent-regexp-user-control-end "^.*'.*\s*PLANTUML_MODE_INDENT_DECREASE\s*.*$")
       (defvar plantuml-indent-regexp-end (list plantuml-indent-regexp-block-end
diff --git a/test/plantuml-indentation-activity-new-test.el b/test/plantuml-indentation-activity-new-test.el
index 1f6167b..176b01e 100644
--- a/test/plantuml-indentation-activity-new-test.el
+++ b/test/plantuml-indentation-activity-new-test.el
@@ -384,7 +384,7 @@ stop
 
 @enduml"))
 
-(ert-deftest plantuml-test-indentation/activity-new/switch ()
+(ert-deftest plantuml-test-indentation/activity-new/switch-1 ()
   "Test correct indentation of plantuml activity-new complete example
 These code examples are taken from www.plantuml.com"
   (plantuml-test-indent-block
@@ -422,6 +422,44 @@ endswitch
 stop
 @enduml"))
 
+(ert-deftest plantuml-test-indentation/activity-new/switch-2 ()
+  "Test correct indentation of plantuml activity-new complete example
+These code examples are taken from www.plantuml.com"
+  (plantuml-test-indent-block
+   "@startuml
+start
+switch (test? (is it?))
+case ( condition (A) )
+:Text 1;
+case ( condition B (we do not care whether parentheses match or not)
+:Text 2;
+case ( condition C )))
+:Text 3;
+case ( condition D )
+:Text 4;
+case ( condition E )
+:Text 5;
+endswitch
+stop
+@enduml"
+
+   "@startuml
+start
+switch (test? (is it?))
+case ( condition (A) )
+  :Text 1;
+case ( condition B (we do not care whether parentheses match or not)
+  :Text 2;
+case ( condition C )))
+  :Text 3;
+case ( condition D )
+  :Text 4;
+case ( condition E )
+  :Text 5;
+endswitch
+stop
+@enduml"))
+
 (provide 'plantuml-indentation-activity-new-test)
 
 ;;; plantuml-indentation-activity-old-test.el ends here