diff --git a/src/proc/mobject/test-dummy-mobject.hpp b/src/proc/mobject/test-dummy-mobject.hpp
index 14542b629..325244691 100644
--- a/src/proc/mobject/test-dummy-mobject.hpp
+++ b/src/proc/mobject/test-dummy-mobject.hpp
@@ -90,7 +90,7 @@ namespace test    {
       string
       display(Symbol name)  const
         {
-          static format fmt("%s(ID=%4d)");
+          static format fmt("%s(ID=%03d)");
           return boost::str(fmt % name % this->id_);
         }
     };
diff --git a/tests/43session.tests b/tests/43session.tests
index dd86bcc31..0ecfa5964 100644
--- a/tests/43session.tests
+++ b/tests/43session.tests
@@ -96,9 +96,9 @@ out: Placement.+mobject.+test.+TestSubMO1.+. use-cnt=1 .*
 out: Placement.+mobject.+test.+TestSubMO2.+. use-cnt=1 .*
 out: Placement.+mobject.+test.+TestSubMO21.+ use-cnt=2 .*
 out: Placement.+mobject.+session.+Clip.+.... use-cnt=2 .*
-out: TestSubMO1\(ID= [0-9]{3}\)
-out: TestSubMO2\(ID= [0-9]{3}\)
-out: TestSubMO21\(ID= [0-9]{3}\)
+out: TestSubMO1\(ID=[0-9]{3}\)
+out: TestSubMO2\(ID=[0-9]{3}\)
+out: TestSubMO21\(ID=[0-9]{3}\)
 out: specialAPI()
 out: pID\(\w{6,16}\)
 END