diff --git a/tests/build/Makefile b/tests/build/Makefile
index 158a360..ce8a3bd 100644
--- a/tests/build/Makefile
+++ b/tests/build/Makefile
@@ -6,7 +6,7 @@ LDFLAGS  := -lpcre
 
 all: $(TARGET)
 
-$(TARGET): $(shell which imbecile)
+$(TARGET): $(shell which imbecile) $(I_SOURCE).I $(wildcard *.cc)
 	imbecile $(I_SOURCE).I
 	$(CXX) -o $@ *.cc $(LDFLAGS)
 
diff --git a/tests/build/itest.I b/tests/build/itest.I
index 986921e..7cc7320 100644
--- a/tests/build/itest.I
+++ b/tests/build/itest.I
@@ -6,7 +6,9 @@ OR          or
 NOT         not
 LPAREN      \(
 RPAREN      \)
-WS          \s+
+WS          \s+ {{
+    cout << "Hi there WS!!!!!" << endl;
+}}
 EQUALS      =
 IDENTIFIER  [a-zA-Z_][a-zA-Z_0-9]*