It seems we simply expected the same output for failure and success.

Michael Meskes · Michael Meskes · commit 002b4781bada · 2007-08-14T11:21:38.000Z
diff --git a/src/interfaces/ecpg/test/expected/thread-thread.stdout b/src/interfaces/ecpg/test/expected/thread-thread.stdout
@@ -1 +1 @@
-Success.
+No threading enabled.
diff --git a/src/interfaces/ecpg/test/expected/thread-thread_implicit.stdout b/src/interfaces/ecpg/test/expected/thread-thread_implicit.stdout
@@ -1 +1 @@
-Success.
+No threading enabled.
