diff --git a/test/Makefile b/test/Makefile
index f484ccf..00c3c50 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -33,4 +33,4 @@ clean:
 	find ./obj/ -type f | grep -v '.gitkeep' | xargs rm -rf
 	find ./conan/ -type f | grep -v '.gitkeep' | xargs rm -rf
 
-.PHONY: all dirs clean $(TESTS:%=$(BIND)/%)
+.PHONY: all dirs clean $(TESTS:%=$(BIND)/%) $(BIND)/_test
diff --git a/test/src/test_sources.cpp b/test/src/test_sources.cpp
index f81e13f..4600bcd 100644
--- a/test/src/test_sources.cpp
+++ b/test/src/test_sources.cpp
@@ -102,7 +102,7 @@ TEST_CASE("Generator from std::istream") {
   }
 
   bool genstate = gen;
-  CHECK(genstate);
+  CHECK(!genstate);
 }
 
 TEST_CASE("Generator from std::istream, by lines") {