Index: build/test/do-nightly-tests-and-publish
==================================================================
--- build/test/do-nightly-tests-and-publish
+++ build/test/do-nightly-tests-and-publish
@@ -26,10 +26,16 @@
 	echo 'Missing scripts, aborting.' >&2
 
 	exit 1
 fi
 
+# Only run one at a time
+if [ -f '__AUTO_TESTS_RUNNING__' ]; then
+	exit 1
+fi
+touch '__AUTO_TESTS_RUNNING__'
+
 # Clean builds
 rm -rf kits
 
 # Run tests
 nice -n 20 ./test >/dev/null 2>/dev/null
@@ -38,6 +44,9 @@
 rm -rf "${WEBROOTDIR}"/svn_r*/
 
 # Publish New Results
 ./publish-tests "${TESTNAME}"
 
+# Clean
+rm -f '__AUTO_TESTS_RUNNING__'
+
 exit 0

ADDED   build/test/tests/08-interp.tcl
Index: build/test/tests/08-interp.tcl
==================================================================
--- build/test/tests/08-interp.tcl
+++ build/test/tests/08-interp.tcl
@@ -0,0 +1,12 @@
+#! /usr/bin/env tclsh
+
+set newinterp [interp create]
+
+if {[string match "interp*" $newinterp]} {
+	exit 0
+}
+
+puts "Interp Name: $newinterp"
+puts "Expected:    interp*"
+
+exit 1