diff --git a/Cargo.lock b/Cargo.lock
index b1e2b21..351722c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -268,7 +268,7 @@ dependencies = [
 
 [[package]]
 name = "dotree"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "anyhow",
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index bc2a918..e31884b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dotree"
-version = "0.6.0"
+version = "0.7.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/grammar.pest b/grammar.pest
index 22bdb88..1a75aa7 100644
--- a/grammar.pest
+++ b/grammar.pest
@@ -36,7 +36,7 @@ cmd_body = { ((cmd_settings|vars_def|shell_def) ~ NEWLINE)* ~ quick_command }
 vars_def = { "vars" ~ var_def ~ (DEF_SEP* ~ var_def)* }
 DEF_SEP = _{"," ~ NEWLINE*}
 var_def = { symbol ~ default_var? }
-default_var = { "=" ~ normal_string }
+default_var = { "=" ~ string }
 cmd_settings = { "set" ~ symbol ~ (DEF_SEP* ~ symbol)* }
 
 shell_def = {"shell" ~ (string|word)+ }
diff --git a/src/core.rs b/src/core.rs
index 82468d2..24d870c 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -257,10 +257,10 @@ fn query_env_var(
     if line.is_empty() {
         if let Some(default_val) = default_val {
             hist.push(default_val.to_string());
+            return Ok(hist);
         }
-    } else {
-        hist.push(line);
     }
+    hist.push(line);
     Ok(hist)
 }
 
diff --git a/src/parser.rs b/src/parser.rs
index 83659b3..7b14a1f 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -294,8 +294,7 @@ fn parse_vars_def(p: Pair<'_, Rule>) -> Vec<VarDef> {
         let name = name_def.as_str().to_string();
         let value = value_def.map(|v| {
             assert!(v.as_rule() == Rule::default_var, "unexpected rule: {p:#?}");
-            // v(default_var) -> normal_string -> normal_content
-            v.inext().inext().as_str().to_string()
+            from_string(v.inext())
         });
 
         VarDef { name, value }
@@ -685,8 +684,14 @@ Config {
                     name: None,
                     shell: None,
                     env_vars: [
-                        "foo",
-                        "bar",
+                        VarDef {
+                            name: "foo",
+                            value: None,
+                        },
+                        VarDef {
+                            name: "bar",
+                            value: None,
+                        },
                     ],
                 },
             ),
diff --git a/tests/bash_tests/arg_test.bash b/tests/bash_tests/arg_test.bash
new file mode 100644
index 0000000..555e27c
--- /dev/null
+++ b/tests/bash_tests/arg_test.bash
@@ -0,0 +1,8 @@
+$DT -c arg_test.dt f alpha beta gamma
+
+printf "lala\n" | $DT -c arg_test.dt f alpha beta
+
+printf "\n" | $DT -c arg_test.dt f alpha beta
+
+printf "\n\n\n" | $DT -c arg_test.dt f
+
diff --git a/tests/bash_tests/arg_test.dt b/tests/bash_tests/arg_test.dt
new file mode 100644
index 0000000..0402a78
--- /dev/null
+++ b/tests/bash_tests/arg_test.dt
@@ -0,0 +1,6 @@
+menu root {
+	f: cmd {
+		vars a, b, c="foo"
+		"echo $a $b $c"
+	}
+}
diff --git a/tests/bash_tests/arg_test.out b/tests/bash_tests/arg_test.out
new file mode 100644
index 0000000..3a94b59
--- /dev/null
+++ b/tests/bash_tests/arg_test.out
@@ -0,0 +1,4 @@
+[?25l[?25halpha beta gamma
+[?25l[?25h
alpha beta lala
+[?25l[?25h
alpha beta foo
+[?25l[?25h


foo