diff --git a/test/core_d12.py b/test/core_d12.py
index c25fbb856..72ec9de53 100644
--- a/test/core_d12.py
+++ b/test/core_d12.py
@@ -4,7 +4,7 @@
 
 import BoostBuild
 
-t = BoostBuild.Tester()
+t = BoostBuild.Tester(pass_toolset=0)
 
 t.write("file.jam", """
 actions a {    
diff --git a/test/core_typecheck.py b/test/core_typecheck.py
new file mode 100644
index 000000000..08ca631cd
--- /dev/null
+++ b/test/core_typecheck.py
@@ -0,0 +1,43 @@
+#!/usr/bin/python
+
+# This tests the typechecking facilities.
+
+import BoostBuild
+
+t = BoostBuild.Tester(pass_toolset=0)
+
+t.write("file.jam", """
+module .typecheck 
+{
+    rule [path] ( x )
+    {
+	if ! [ MATCH "^(::)" : $(x) ] 
+	{
+	    ECHO "Error: $(x) is not a path" ;
+	    return true ;
+	}
+    }
+}
+
+rule do ( [path] a )
+{
+}
+
+do $(ARGUMENT) ;
+
+actions dummy { } 
+dummy all ;
+""")
+
+t.run_build_system("-ffile.jam -sARGUMENT=::a/b/c")
+t.run_build_system("-ffile.jam -sARGUMENT=a/b/c", status=1,
+                   stdout="""Error: a/b/c is not a path
+file.jam:18: in module scope
+*** argument error
+* rule do ( [path] a )
+* called with: ( a/b/c )
+* true a
+file.jam:16:see definition of rule 'do' being called
+""")
+
+t.cleanup()
diff --git a/test/test_all.py b/test/test_all.py
index 4c8b17f09..62455a3f2 100644
--- a/test/test_all.py
+++ b/test/test_all.py
@@ -61,6 +61,9 @@ def reorder_tests(tests, first_test):
 
             
 critical_tests = ["unit_tests", "module_actions", "startup_v1", "startup_v2"]
+
+critical_tests += ["core_d12", "core_typecheck"]
+
 tests = [ "project_test1",
           "project_test3",
           "project_test4",
diff --git a/v2/test/core_d12.py b/v2/test/core_d12.py
index c25fbb856..72ec9de53 100644
--- a/v2/test/core_d12.py
+++ b/v2/test/core_d12.py
@@ -4,7 +4,7 @@
 
 import BoostBuild
 
-t = BoostBuild.Tester()
+t = BoostBuild.Tester(pass_toolset=0)
 
 t.write("file.jam", """
 actions a {    
diff --git a/v2/test/core_typecheck.py b/v2/test/core_typecheck.py
new file mode 100644
index 000000000..08ca631cd
--- /dev/null
+++ b/v2/test/core_typecheck.py
@@ -0,0 +1,43 @@
+#!/usr/bin/python
+
+# This tests the typechecking facilities.
+
+import BoostBuild
+
+t = BoostBuild.Tester(pass_toolset=0)
+
+t.write("file.jam", """
+module .typecheck 
+{
+    rule [path] ( x )
+    {
+	if ! [ MATCH "^(::)" : $(x) ] 
+	{
+	    ECHO "Error: $(x) is not a path" ;
+	    return true ;
+	}
+    }
+}
+
+rule do ( [path] a )
+{
+}
+
+do $(ARGUMENT) ;
+
+actions dummy { } 
+dummy all ;
+""")
+
+t.run_build_system("-ffile.jam -sARGUMENT=::a/b/c")
+t.run_build_system("-ffile.jam -sARGUMENT=a/b/c", status=1,
+                   stdout="""Error: a/b/c is not a path
+file.jam:18: in module scope
+*** argument error
+* rule do ( [path] a )
+* called with: ( a/b/c )
+* true a
+file.jam:16:see definition of rule 'do' being called
+""")
+
+t.cleanup()
diff --git a/v2/test/test_all.py b/v2/test/test_all.py
index 4c8b17f09..62455a3f2 100644
--- a/v2/test/test_all.py
+++ b/v2/test/test_all.py
@@ -61,6 +61,9 @@ def reorder_tests(tests, first_test):
 
             
 critical_tests = ["unit_tests", "module_actions", "startup_v1", "startup_v2"]
+
+critical_tests += ["core_d12", "core_typecheck"]
+
 tests = [ "project_test1",
           "project_test3",
           "project_test4",