diff --git a/mk/tests.mk b/mk/tests.mk
index 6068af8f7f463..2e500ffeb0a50 100644
--- a/mk/tests.mk
+++ b/mk/tests.mk
@@ -171,7 +171,7 @@ endif
 # Main test targets
 ######################################################################
 
-check: cleantmptestlogs cleantestlibs check-notidy tidy check-syntax
+check: cleantmptestlogs cleantestlibs check-notidy tidy
 
 check-notidy: cleantmptestlogs cleantestlibs all check-stage2
 	$(Q)$(CFG_PYTHON) $(S)src/etc/check-summary.py tmp/*.log
diff --git a/src/grammar/README.md b/src/grammar/README.md
index 69f8ab1e486aa..f5b872cdc7f67 100644
--- a/src/grammar/README.md
+++ b/src/grammar/README.md
@@ -1,9 +1,10 @@
 Reference grammar.
 
 Uses [antlr4](http://www.antlr.org/) and a custom Rust tool to compare
-ASTs/token streams generated.
+ASTs/token streams generated. You can use the `check-syntax` make target to
+run all of the available tests.
 
-To use:
+To use manually:
 
 ```
 antlr4 RustLexer.g4