diff --git a/Cargo.lock b/Cargo.lock
index e5e135a..664d82e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -194,6 +194,7 @@ dependencies = [
 name = "itconfig"
 version = "1.1.1"
 dependencies = [
+ "criterion",
  "itconfig-macro",
  "lazy_static",
 ]
@@ -209,15 +210,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "itconfig_tests"
-version = "0.1.0"
-dependencies = [
- "criterion",
- "itconfig",
- "lazy_static",
-]
-
 [[package]]
 name = "itertools"
 version = "0.10.3"
diff --git a/Cargo.toml b/Cargo.toml
index c9ef965..42e7df4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,44 @@
 [workspace]
 members = [
-    "itconfig",
     "itconfig-macro",
-    "itconfig-tests",
 ]
 
+[package]
+name = "itconfig"
+version = "1.1.1"
+authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"]
+description = "Easy build a configs from environment variables and use it in globally."
+categories = ["config", "web-programming"]
+keywords = ["config", "env", "configuration", "environment", "macro"]
+edition = "2018"
+license = "MIT"
+repository = "https://github.com/pleshevskiy/itconfig-rs"
+homepage = "https://github.com/pleshevskiy/itconfig-rs"
+documentation = "https://docs.rs/itconfig"
+readme = "../README.md"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[features]
+default = []
+
+macro = ["itconfig-macro"]
+
+number = []
+bool  = []
+vec = []
+
+[dependencies]
+itconfig-macro = { version = "1.1", path = "itconfig-macro", optional = true }
+
+[dev-dependencies]
+lazy_static = "1.4.0"
+criterion = "0.3.1"
+
+[badges]
+maintenance = { status = "actively-developed" }
+
+# https://docs.rs/about
+[package.metadata.docs.rs]
+all-features = true
+
diff --git a/itconfig-tests/benches/main_benches.rs b/benches/main_benches.rs
similarity index 100%
rename from itconfig-tests/benches/main_benches.rs
rename to benches/main_benches.rs
diff --git a/itconfig-macro/Cargo.toml b/itconfig-macro/Cargo.toml
index 45c81ba..4d88505 100644
--- a/itconfig-macro/Cargo.toml
+++ b/itconfig-macro/Cargo.toml
@@ -22,7 +22,7 @@ quote = "1.0.9"
 proc-macro2 = "1.0.24"
 
 [dev-dependencies]
-itconfig = { path = "../itconfig" }
+itconfig = { path = ".." }
 lazy_static = "1.4.0"
 
 [badges]
diff --git a/itconfig-tests/Cargo.toml b/itconfig-tests/Cargo.toml
deleted file mode 100644
index 7a72838..0000000
--- a/itconfig-tests/Cargo.toml
+++ /dev/null
@@ -1,22 +0,0 @@
-[package]
-name = "itconfig_tests"
-version = "0.1.0"
-authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"]
-edition = "2018"
-license = "MIT"
-publish = false
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-itconfig = { path = '../itconfig', features = ["macro"] }
-criterion = "0.3.1"
-lazy_static = "1.4.0"
-
-[features]
-default = ["meta_namespace"]
-meta_namespace = []
-
-[[bench]]
-name = "main_benches"
-harness = false
diff --git a/itconfig/Cargo.toml b/itconfig/Cargo.toml
deleted file mode 100644
index 5a408eb..0000000
--- a/itconfig/Cargo.toml
+++ /dev/null
@@ -1,38 +0,0 @@
-[package]
-name = "itconfig"
-version = "1.1.1"
-authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"]
-description = "Easy build a configs from environment variables and use it in globally."
-categories = ["config", "web-programming"]
-keywords = ["config", "env", "configuration", "environment", "macro"]
-edition = "2018"
-license = "MIT"
-repository = "https://github.com/pleshevskiy/itconfig-rs"
-homepage = "https://github.com/pleshevskiy/itconfig-rs"
-documentation = "https://docs.rs/itconfig"
-readme = "../README.md"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[features]
-default = []
-
-macro = ["itconfig-macro"]
-
-number = []
-bool  = []
-vec = []
-
-[dependencies]
-itconfig-macro = { version = "1.1", path = "../itconfig-macro", optional = true }
-
-[dev-dependencies]
-lazy_static = "1.4.0"
-
-[badges]
-maintenance = { status = "actively-developed" }
-
-# https://docs.rs/about
-[package.metadata.docs.rs]
-all-features = true
-
diff --git a/itconfig/src/utils.rs b/itconfig/src/utils.rs
deleted file mode 100644
index 6f33da4..0000000
--- a/itconfig/src/utils.rs
+++ /dev/null
@@ -1,116 +0,0 @@
-use crate::core::EString;
-use crate::error::Error;
-use std::convert::{TryFrom, TryInto};
-use std::env;
-
-pub fn get_env_or_set_default<R>(env_name: &str, default: R) -> Result<R, Error>
-where
-    R: TryFrom<EString> + std::fmt::Display,
-{
-    get_env::<R>(env_name).or_else(|err| match err {
-        Error::NotPresent => {
-            let val = default.to_string();
-            env::set_var(env_name, &val);
-            EString::from(val)
-                .try_into()
-                .map_err(|_| Error::Parse(default.to_string()))
-        }
-        _ => Err(err),
-    })
-}
-
-pub fn get_env<R>(env_name: &str) -> Result<R, Error>
-where
-    R: TryFrom<EString>,
-{
-    env::var(env_name)
-        .map_err(From::from)
-        .map(EString::from)
-        .and_then(|val| {
-            val.clone()
-                .try_into()
-                .map_err(|_| Error::Parse(val.to_string()))
-        })
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    #[cfg(feature = "vec")]
-    use crate::core::vec::{CommaVec, SepVec};
-
-    #[test]
-    fn should_return_variable() {
-        env::set_var("get_env_1", "hello");
-        match get_env::<&str>("get_env_1") {
-            Ok(res) => assert_eq!(res, "hello"),
-            _ => unreachable!(),
-        };
-    }
-
-    #[test]
-    fn should_throw_no_present_error() {
-        match get_env::<&str>("get_env_2") {
-            Err(Error::NotPresent) => {}
-            _ => unreachable!(),
-        };
-    }
-
-    #[test]
-    fn should_throw_parse_error() {
-        env::set_var("get_env_3", "-10");
-        match get_env::<u32>("get_env_3") {
-            Err(Error::Parse(orig)) => {
-                assert_eq!(orig, String::from("-10"))
-            }
-            _ => unreachable!(),
-        };
-    }
-
-    #[test]
-    fn should_set_default_if_var_is_no_present() {
-        let orig = 10;
-        match get_env_or_set_default("get_env_4", orig) {
-            Ok(res) => {
-                assert_eq!(res, orig);
-                assert_eq!(env::var("get_env_4").unwrap(), "10");
-            }
-            _ => unreachable!(),
-        };
-    }
-
-    #[cfg(feature = "vec")]
-    #[test]
-    fn should_return_var_as_vector() {
-        env::set_var("get_env_5", "1,2,3,4,5");
-        match get_env::<CommaVec<i32>>("get_env_5") {
-            Ok(res) => assert_eq!(*res, vec![1, 2, 3, 4, 5]),
-            _ => unreachable!(),
-        };
-    }
-
-    #[cfg(feature = "vec")]
-    #[test]
-    fn should_throw_parse_vec_error() {
-        env::set_var("get_env_6", "1,2,3,4,5");
-        match get_env::<SepVec<i32, '+'>>("get_env_6") {
-            Err(Error::Parse(orig)) => {
-                assert_eq!(orig, String::from("1,2,3,4,5"))
-            }
-            _ => unreachable!(),
-        };
-    }
-
-    #[cfg(feature = "vec")]
-    #[test]
-    fn should_set_default_vector_if_var_is_no_present() {
-        let orig = CommaVec::from(vec![1, 2, 3, 4]);
-        match get_env_or_set_default("get_env_7", orig.clone()) {
-            Ok(res) => {
-                assert_eq!(res, orig);
-                assert_eq!(env::var("get_env_7").unwrap(), "1,2,3,4");
-            }
-            _ => unreachable!(),
-        };
-    }
-}
diff --git a/itconfig/src/core.rs b/src/core.rs
similarity index 100%
rename from itconfig/src/core.rs
rename to src/core.rs
diff --git a/itconfig/src/core/prim.rs b/src/core/prim.rs
similarity index 100%
rename from itconfig/src/core/prim.rs
rename to src/core/prim.rs
diff --git a/itconfig/src/core/vec.rs b/src/core/vec.rs
similarity index 82%
rename from itconfig/src/core/vec.rs
rename to src/core/vec.rs
index 307440c..0857285 100644
--- a/itconfig/src/core/vec.rs
+++ b/src/core/vec.rs
@@ -1,4 +1,4 @@
-use crate::core::EnvString;
+use crate::core::EString;
 use std::convert::TryFrom;
 use std::fmt::Write;
 
@@ -42,16 +42,16 @@ where
     }
 }
 
-impl<T, const SEP: char> TryFrom<EnvString> for SepVec<T, SEP>
+impl<T, const SEP: char> TryFrom<EString> for SepVec<T, SEP>
 where
-    T: TryFrom<EnvString> + std::fmt::Display,
+    T: TryFrom<EString> + std::fmt::Display,
 {
     type Error = T::Error;
 
-    fn try_from(value: EnvString) -> Result<Self, Self::Error> {
+    fn try_from(value: EString) -> Result<Self, Self::Error> {
         let inner = value
             .split(SEP)
-            .map(EnvString::from)
+            .map(EString::from)
             .map(T::try_from)
             .collect::<Result<Vec<_>, _>>()?;
         Ok(Self(inner))
diff --git a/itconfig/src/error.rs b/src/error.rs
similarity index 100%
rename from itconfig/src/error.rs
rename to src/error.rs
diff --git a/itconfig/src/lib.rs b/src/lib.rs
similarity index 100%
rename from itconfig/src/lib.rs
rename to src/lib.rs
diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..fa1ed61
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,182 @@
+use crate::core::EString;
+use crate::error::Error;
+use std::convert::{TryFrom, TryInto};
+use std::env;
+
+pub fn get_env_or_set_default<R>(env_name: &str, default: R) -> Result<R, Error>
+where
+    R: TryFrom<EString> + std::fmt::Display,
+{
+    get_env::<R>(env_name).or_else(|err| match err {
+        Error::NotPresent => {
+            let val = default.to_string();
+            env::set_var(env_name, &val);
+            EString::from(val)
+                .try_into()
+                .map_err(|_| Error::Parse(default.to_string()))
+        }
+        _ => Err(err),
+    })
+}
+
+pub fn get_env<R>(env_name: &str) -> Result<R, Error>
+where
+    R: TryFrom<EString>,
+{
+    env::var(env_name)
+        .map_err(From::from)
+        .map(EString::from)
+        .and_then(|val| {
+            val.clone()
+                .try_into()
+                .map_err(|_| Error::Parse(val.to_string()))
+        })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    struct TestCase<const N: u8>;
+
+    impl<const N: u8> std::fmt::Display for TestCase<N> {
+        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+            write!(f, "get_env_{}", N)
+        }
+    }
+
+    #[test]
+    fn should_return_variable() {
+        let en = TestCase::<1>.to_string();
+        env::set_var(&en, "hello");
+        match get_env::<&str>(&en) {
+            Ok(res) => assert_eq!(res, "hello"),
+            _ => unreachable!(),
+        };
+    }
+
+    #[test]
+    fn should_throw_no_present_error() {
+        let en = TestCase::<2>.to_string();
+        match get_env::<&str>(&en) {
+            Err(Error::NotPresent) => {}
+            _ => unreachable!(),
+        };
+    }
+
+    #[test]
+    fn should_set_default_if_var_is_no_present() {
+        let en = TestCase::<3>.to_string();
+        let orig = "hello";
+        match get_env_or_set_default(&en, orig) {
+            Ok(res) => {
+                assert_eq!(res, orig);
+                assert_eq!(env::var(&en).unwrap(), orig);
+            }
+            _ => unreachable!(),
+        };
+    }
+
+    #[cfg(feature = "number")]
+    mod numbers {
+        use super::*;
+
+        #[test]
+        fn should_throw_parse_error() {
+            let en = TestCase::<4>.to_string();
+            env::set_var(&en, "-10");
+            match get_env::<u32>(&en) {
+                Err(Error::Parse(orig)) => {
+                    assert_eq!(orig, String::from("-10"))
+                }
+                _ => unreachable!(),
+            };
+        }
+
+        #[test]
+        fn should_set_default_num_if_var_is_no_present() {
+            let en = TestCase::<5>.to_string();
+            let orig = 10;
+            match get_env_or_set_default(&en, orig) {
+                Ok(res) => {
+                    assert_eq!(res, orig);
+                    assert_eq!(env::var(&en).unwrap(), "10");
+                }
+                _ => unreachable!(),
+            };
+        }
+    }
+
+    #[cfg(feature = "bool")]
+    mod boolean {
+        use super::*;
+
+        #[test]
+        fn should_parse_bool_variable() {
+            let en = TestCase::<5>.to_string();
+
+            [
+                ("y", true),
+                ("yes", true),
+                ("true", true),
+                ("t", true),
+                ("on", true),
+                ("false", false),
+                ("f", false),
+            ]
+            .iter()
+            .for_each(|(val, expected)| {
+                let mut en = en.clone();
+                en.push_str(val.as_ref());
+
+                env::set_var(&en, val);
+                match get_env::<bool>(&en) {
+                    Ok(res) => assert_eq!(res, *expected),
+                    _ => unreachable!(),
+                };
+            })
+        }
+    }
+
+    #[cfg(feature = "vec")]
+    mod vector {
+        use super::*;
+        use crate::core::vec::{CommaVec, SepVec};
+
+        #[test]
+        fn should_return_var_as_vector() {
+            let en = TestCase::<6>.to_string();
+
+            env::set_var(&en, "1,2,3,4,5");
+            match get_env::<CommaVec<i32>>(&en) {
+                Ok(res) => assert_eq!(*res, vec![1, 2, 3, 4, 5]),
+                _ => unreachable!(),
+            };
+        }
+
+        #[test]
+        fn should_throw_parse_vec_error() {
+            let en = TestCase::<7>.to_string();
+            env::set_var(&en, "1,2,3,4,5");
+            match get_env::<SepVec<i32, '+'>>(&en) {
+                Err(Error::Parse(orig)) => {
+                    assert_eq!(orig, String::from("1,2,3,4,5"))
+                }
+                _ => unreachable!(),
+            };
+        }
+
+        #[test]
+        fn should_set_default_vector_if_var_is_no_present() {
+            let en = TestCase::<8>.to_string();
+            let orig = CommaVec::from(vec![1, 2, 3, 4]);
+            match get_env_or_set_default(&en, orig.clone()) {
+                Ok(res) => {
+                    assert_eq!(res, orig);
+                    assert_eq!(env::var(&en).unwrap(), "1,2,3,4");
+                }
+                _ => unreachable!(),
+            };
+        }
+    }
+}
diff --git a/itconfig-tests/tests/config_macro.rs b/tests/config_macro.rs
similarity index 100%
rename from itconfig-tests/tests/config_macro.rs
rename to tests/config_macro.rs