diff --git a/t/t0005-new_var.sh b/t/t0005-new_var.sh
new file mode 100755
index 0000000..6ca0838
--- /dev/null
+++ b/t/t0005-new_var.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+test_description="create new var"
+
+. setup.sh
+
+DIR_TEST=$SHARNESS_TEST_DIRECTORY/t0005
+
+test_expect_success "Parse new var" "
+    export COVERAGE_NAME=new_var_parser
+    cp ../.simplecov .
+    cfg_parser $DIR_TEST/var.ini
+    cfg_section_sec1
+    var2=bar
+    cfg_update sec1 var2
+    cfg_writer > var.out
+    diff $DIR_TEST/var.out.correct var.out
+"
+
+test_done
diff --git a/t/t0005/var.ini b/t/t0005/var.ini
new file mode 100644
index 0000000..f30281c
--- /dev/null
+++ b/t/t0005/var.ini
@@ -0,0 +1,2 @@
+[sec1]
+var1=foo
diff --git a/t/t0005/var.out.correct b/t/t0005/var.out.correct
new file mode 100644
index 0000000..fbf049c
--- /dev/null
+++ b/t/t0005/var.out.correct
@@ -0,0 +1,3 @@
+[sec1]
+var1="foo"
+var2="bar"