diff --git a/infer/tests/javac.make b/infer/tests/javac.make
index c530d83b0..0f136fd2c 100644
--- a/infer/tests/javac.make
+++ b/infer/tests/javac.make
@@ -21,6 +21,6 @@ $(OBJECTS): $(SOURCES)
 
 infer-out/report.json: $(JAVA_DEPS) $(SOURCES) $(MAKEFILE_LIST)
 	$(QUIET)$(call silent_on_success,Testing infer/java in $(TEST_REL_DIR),\
-	  $(INFER_BIN) --project-root $(PROJECT_ROOT) \
+	  $(INFER_BIN) --project-root $(PROJECT_ROOT) --dump-duplicate-symbols \
 	    $(INFER_OPTIONS) -- \
 	    $(JAVAC) -cp $(CLASSPATH) $(SOURCES))