diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c1bfe8ee328a2d2014399304b727c4b0ab85fc27..393b2fa34667b79ac406c85b657b3138e560fd40 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -14,7 +14,6 @@ test:all:
     - cmake --build build --target unit_tests
     - ./build/src/tests/unit_tests
     - cmake --build build --target mfix-parser
-    # - find -name inputs
-    # - find -name inputs |xargs -l ./build/mfix-parser
+    - find -name inputs |grep -v tutorials/wdf/mueller | xargs -l ./build/mfix-parser # FIXME: correct syntax error (= =) in file
   tags:
     - mfix-exa
diff --git a/src/parser.cpp b/src/parser.cpp
index 5d7bcca418ddb52cc668e271b30c4c6fce8967d8..79063567bafb63c8ed073bf4bb8e2b3499f33ef1 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -51,8 +51,8 @@ struct p : one<'p', 'P'> {};
 struct exponent : seq<plus_minus, plus<digit>> {};
 struct double_ : seq<plus_minus, decimal, opt<e, exponent>> {};
 
-struct num_array : list<double_, plus<one<' '>>> {};
-struct str_array : list<string_literal, plus<one<' '>>> {};
+struct num_array : list<double_, plus<blank>> {};
+struct str_array : list<string_literal, plus<blank>> {};
 
 struct value : sor<num_array, str_array> {};
 struct comment : if_must<one<'#'>, until<eolf>> {};
@@ -62,7 +62,7 @@ struct value_list : list_must<value_item, one<','>> {};
 struct keyval_line
     : if_must<pad<key, space>, string<'='>, value_list, sor<comment, eolf>> {};
 struct comment_line : seq<one<'#'>, until<eolf>> {};
-struct blank_line : seq<star<one<' '>>, until<eolf>> {};
+struct blank_line : seq<star<blank>, until<eolf>> {};
 struct line : sor<comment_line, keyval_line, blank_line> {};
 struct grammar : until<eof, line> {};
 
diff --git a/src/tests/parser.t.cpp b/src/tests/parser.t.cpp
index cada1ec36b4f3becf0383bfc09acbb06163f6ca6..13163043fa87447da0e89fdfc0dcc5e31cccccd9 100644
--- a/src/tests/parser.t.cpp
+++ b/src/tests/parser.t.cpp
@@ -57,6 +57,21 @@ fluid.solve = fluid
   CHECK(ss[0] == "fluid");
 }
 
+TEST_CASE("tabbed array", "[]") {
+  auto maybe_st = parser::parse_inputs(R"(
+ amr.avg_vel_p	=	0	0	0
+)");
+
+  REQUIRE(maybe_st.has_value());
+  auto info = maybe_st.value();
+  auto value = info["amr.avg_vel_p"];
+  auto aa = std::get<parser::NumberArray>(value);
+  CHECK(aa.size() == 3);
+  CHECK(aa[0] == 0.0);
+  CHECK(aa[1] == 0.0);
+  CHECK(aa[2] == 0.0);
+}
+
 TEST_CASE("double array", "[]") {
   auto maybe_st = parser::parse_inputs(R"(
   mfix.gravity = -9.81  0.0  0.0
@@ -71,6 +86,7 @@ TEST_CASE("double array", "[]") {
   CHECK(aa[1] == 0.0);
   CHECK(aa[2] == 0.0);
 }
+
 TEST_CASE("string array", "[]") {
   auto maybe_st = parser::parse_inputs(R"(
   mfix.regions = abc  ijk  xyz