diff --git a/corpus/create_sequence_statement.txt b/corpus/create_sequence_statement.txt
index 036de7b..4b43a95 100644
--- a/corpus/create_sequence_statement.txt
+++ b/corpus/create_sequence_statement.txt
@@ -222,7 +222,6 @@ owned by none;
     (as
       (identifier))
     (sequence_increment
-      (ERROR)
       (number))
     (sequence_min
       (number))
diff --git a/corpus/grant_statement.txt b/corpus/grant_statement.txt
index c12d6b6..75a66b6 100644
--- a/corpus/grant_statement.txt
+++ b/corpus/grant_statement.txt
@@ -15,7 +15,7 @@ grant all on table foo to postgres;
 ================================================================================
 all privileges
 ================================================================================
-grant all privileges on table foo.bar to postgres;
+GRANT ALL PRIVILEGES ON TABLE FOO.BAR TO POSTGRES;
 --------------------------------------------------------------------------------
 
 (source_file
diff --git a/corpus/plpgsql/block.txtor_statement.txt b/corpus/plpgsql/for_statement.txt
similarity index 100%
rename from corpus/plpgsql/block.txtor_statement.txt
rename to corpus/plpgsql/for_statement.txt
diff --git a/corpus/plpgsql/raise_statement.txt b/corpus/plpgsql/raise_statement.txt
index 4cf3b2b..b598f90 100644
--- a/corpus/plpgsql/raise_statement.txt
+++ b/corpus/plpgsql/raise_statement.txt
@@ -11,7 +11,7 @@ end $$;
     (block
       (dollar_quote)
       (body
-        (ERROR))
+        (raise_statement))
       (dollar_quote))))
 
 ================================================================================
diff --git a/corpus/select_statement/value_expression.txt b/corpus/select_statement/value_expression.txt
index 2dfcd6b..5e2e2ec 100644
--- a/corpus/select_statement/value_expression.txt
+++ b/corpus/select_statement/value_expression.txt
@@ -33,9 +33,7 @@ SELECT 1234, -25, TRUE, FALSE, NULL, *;
     (select_item
       (number))
     (select_item
-      (op_expression
-        (minus)
-        (number)))
+      (number))
     (select_item
       (true))
     (select_item
@@ -89,9 +87,7 @@ SELECT -22 + - (5 + 1);
   (select_statement
     (select_item
       (op_expression
-        (op_expression
-          (minus)
-          (number))
+        (number)
         (op_expression
           (minus)
           (op_expression
diff --git a/grammar.js b/grammar.js
index cf0c447..89ac368 100644
--- a/grammar.js
+++ b/grammar.js
@@ -297,7 +297,7 @@ module.exports = grammar({
 
 
     grant_privileges: $ => choice(
-      seq(kw("all"), optional("privileges")),
+      seq(kw("all"), optional(kw("privileges"))),
       commaSep1($.identifier),
     ),
 
@@ -437,9 +437,12 @@ module.exports = grammar({
 
     // TODO(chrde): https://www.postgresql.org/docs/13/plpgsql-errors-and-messages.html
     raise_statement: $ => seq(
-      kw("raise"), optional($.identifier),
-      $.string, 
-      optional(seq(",", commaSep($._value_expression)))
+      kw("raise"),
+      optional(seq(
+        optional($.identifier),
+        $.string, 
+        optional(seq(",", commaSep($._value_expression)))
+      )),
     ),
 
     if_statement: $ => seq(
@@ -810,7 +813,7 @@ module.exports = grammar({
     null: $ => kw("null"),
     star: $ => "*",
     any: $ => /.*/,
-    number: $ => /\d+/,
+    number: $ => /-?\d+/,
     identifier: $ => $._identifier,
     _identifier: $ => /[a-zA-Z0-9_]+(\.?[a-zA-Z0-9_]+)*/,
     //                                ^