diff --git a/deps.edn b/deps.edn
new file mode 100644
index 0000000..dd22308
--- /dev/null
+++ b/deps.edn
@@ -0,0 +1,5 @@
+{:path ["src"]
+ :deps {org.clojure/clojure       {:mvn/version "1.9.0"}
+        org.clojure/clojurescript {:mvn/version "1.10.339"}
+        alumbra/parser            {:mvn/version "0.1.7"}
+        camel-snake-kebab         {:mvn/version "0.4.1"}}}
diff --git a/src/graphql_builder/generators/composed_mutation.cljc b/src/graphql_builder/generators/composed_mutation.cljc
index ac5fdff..e1de012 100644
--- a/src/graphql_builder/generators/composed_mutation.cljc
+++ b/src/graphql_builder/generators/composed_mutation.cljc
@@ -23,7 +23,7 @@
         mutation (make-mutation mutation-name composition-parts)]
     (fn op-fn
       ([] (op-fn {}))
-      ([vars]
+      ([& vars]
        (let [namespaced-vars (composed-query/namespace-vars prefixes vars)]
          {:graphql {:operationName mutation-name
                     :query mutation
diff --git a/src/graphql_builder/generators/composed_query.cljc b/src/graphql_builder/generators/composed_query.cljc
index af1c01e..00baadd 100644
--- a/src/graphql_builder/generators/composed_query.cljc
+++ b/src/graphql_builder/generators/composed_query.cljc
@@ -32,10 +32,10 @@
 (defn query-variables [composition-parts]
   (let [variables (remove nil? (map :variables (vals composition-parts)))]
     (when (seq variables)
-      (str "(" (str/join ", " variables) ")"))))
+      (str "(" (str/join "," variables) ")"))))
 
 (defn make-query [query-name composition-parts]
-  (-> [(str "query " query-name (query-variables composition-parts) " {")
+  (-> [(str "query " query-name (query-variables composition-parts) "{")
        (map :children (vals composition-parts))
        "}"]
       flatten
@@ -45,10 +45,13 @@
   [(str (get prefixes query-key) "__" key) var])
 
 (defn namespace-vars [prefixes vars]
-  (reduce (fn [acc [query-key vars]]
-            (let [prepared (util/variables->graphql vars)]
+  (reduce (fn [acc entry]
+            (let [query-key (ffirst entry)
+                  vareables (-> entry first second)
+                  prepared  (util/variables->graphql vareables)]
               (merge acc (into {} (map #(namespace-var prefixes query-key %) prepared)))))
-          {} vars))
+          {}
+          vars))
 
 (defn make-unpack [prefixes]
   (fn [data]
@@ -60,7 +63,7 @@
             {} data)))
 
 (defn generate [visitor queries nodes]
-  (let [query-name "ComposedQuery" 
+  (let [query-name "ComposedQuery"
         prefixes (make-prefixes queries)
         query-nodes (make-query-nodes nodes queries)
         composition-parts (make-composition-parts visitor query-nodes prefixes)
@@ -68,7 +71,7 @@
         query (make-query query-name composition-parts)]
     (fn op-fn
       ([] (op-fn {}))
-      ([vars]
+      ([& vars]
        (let [namespaced-vars (namespace-vars prefixes vars)]
          {:graphql {:operationName query-name
                     :query query
diff --git a/src/graphql_builder/generators/field.cljc b/src/graphql_builder/generators/field.cljc
index a5490a3..eeccd01 100644
--- a/src/graphql_builder/generators/field.cljc
+++ b/src/graphql_builder/generators/field.cljc
@@ -7,7 +7,7 @@
   (let [name (:name node)
         field-name (:field-name node)]
     (if name
-      (str name ": " field-name)
+      (str name ":" field-name)
       field-name)))
 
 (defn generate [visitor deps config indent-level node]
diff --git a/src/graphql_builder/generators/inline_fragment.cljc b/src/graphql_builder/generators/inline_fragment.cljc
index c19d0e9..33f0f84 100644
--- a/src/graphql_builder/generators/inline_fragment.cljc
+++ b/src/graphql_builder/generators/inline_fragment.cljc
@@ -10,7 +10,7 @@
   (str "..." (:name node) (fragment-type-name node) (directives node config)))
 
 (defn open-block [node]
-  (when (has-children? node) " {"))
+  (when (has-children? node) "{"))
 
 (defn close-block [node indent-level]
   (when (has-children? node) (util/indent indent-level "}")))
diff --git a/src/graphql_builder/generators/operation.cljc b/src/graphql_builder/generators/operation.cljc
index 3e784a8..07638cd 100644
--- a/src/graphql_builder/generators/operation.cljc
+++ b/src/graphql_builder/generators/operation.cljc
@@ -27,7 +27,7 @@
 
 (defn node-variables-body [node config]
   (when-let [variables (:variable-definitions node)]
-    (str/join ", " (map #(str "$" (variable-name % config) ": " (variable-value %)) variables))))
+    (str/join "," (map #(str "$" (variable-name % config) ":" (variable-value %)) variables))))
 
 (defn node-variables [node config]
   (when (:variable-definitions node)
@@ -55,7 +55,7 @@
 
 (defn generate [visitor deps config indent-level node]
   [(util/indent indent-level
-                (str (operation-name node) (node-variables node config) " {"))
+                (str (operation-name node) (node-variables node config) "{"))
    (visitor deps config (inc indent-level) (children node config))
    (util/indent indent-level "}")])
 
diff --git a/src/graphql_builder/generators/shared.cljc b/src/graphql_builder/generators/shared.cljc
index 9eae405..308d2ae 100644
--- a/src/graphql_builder/generators/shared.cljc
+++ b/src/graphql_builder/generators/shared.cljc
@@ -31,9 +31,9 @@
 (defn generate-arg-list [args]
   (str "{"
        (->> args
-            (mapv (fn [v] (str (:field-name v) ": " (generate-arg (:value v)))))
-            (str/join ", "))
-    "}"))
+            (mapv (fn [v] (str (:field-name v) ":" (generate-arg (:value v)))))
+            (str/join ","))
+       "}"))
 
 (defn parse-arg [v]
   (cond
@@ -51,7 +51,7 @@
 
 (defn object-default-value [value]
   (str "{ "
-       (str/join ", " (map (fn [v] (str (:name v) ": " (parse-arg (:value v)))) value))
+       (str/join "," (map (fn [v] (str (:name v) ":" (parse-arg (:value v)))) value))
        " }"))
 
 (defn get-enum-or-string-value [argument]
@@ -65,7 +65,7 @@
   (let [value      (:value argument)
         value-type (:value-type argument)]
     (cond
-      (:values value)                                       (str "[" (str/join ", " (map get-enum-or-string-value (:values value))) "]")
+      (:values value)                                       (str "[" (str/join "," (map get-enum-or-string-value (:values value))) "]")
       (and (vector? value) (= :object-value (first value))) (object-default-value (last value))
       :else                                                 (get-enum-or-string-value argument))))
 
@@ -89,7 +89,7 @@
 (defn node-arguments [node config]
   (when-let [arguments (:arguments node)]
     (str "("
-         (str/join ", " (map #(str (:argument-name %) ": " (argument-value % config)) arguments))
+         (str/join "," (map #(str (:argument-name %) ":" (argument-value % config)) arguments))
          ")")))
 
 (defn directive [d config]
@@ -107,7 +107,7 @@
   (boolean (seq (:selection-set node))))
 
 (defn open-block [node]
-  (when (has-children? node) " {"))
+  (when (has-children? node) "{"))
 
 (defn close-block [node indent-level]
   (when (has-children? node) (util/indent indent-level "}")))
diff --git a/src/graphql_builder/parser.cljs b/src/graphql_builder/parser.cljs
index 27209a7..ec7a1e9 100644
--- a/src/graphql_builder/parser.cljs
+++ b/src/graphql_builder/parser.cljs
@@ -1 +1,2 @@
-(ns graphql-builder.parser)
+(ns graphql-builder.parser
+  (:require-macros [graphql-builder.parser]))
diff --git a/src/graphql_builder/util.cljc b/src/graphql_builder/util.cljc
index 81d3f6d..f967f65 100644
--- a/src/graphql_builder/util.cljc
+++ b/src/graphql_builder/util.cljc
@@ -5,7 +5,7 @@
 
 (defn nl-join [coll]
   (when (seq coll)
-    (str/join "\n" (vec (remove nil? coll)))))
+    (str/join "" (vec (remove nil? coll)))))
 
 (defn indent [level line]
   (str (str/join "" (repeat (* 2 level) " ")) line))
diff --git a/test/graphql_builder/core_test.clj b/test/graphql_builder/core_test.clj
index 1c2b3f1..06ea222 100644
--- a/test/graphql_builder/core_test.clj
+++ b/test/graphql_builder/core_test.clj
@@ -8,13 +8,40 @@
             [graphql-builder.util :refer [nl-join variables->graphql]]
             [graphql-builder.parser :refer [parse defgraphql]]))
 
+(def composed-query-source-2 "
+  query Hero($episode: String!) {
+    hero(episode: $episode) {
+      name
+    }
+  }
+")
+
+(def composed-mutation-source "
+mutation AddStarship($name: String!){
+    addStarship(name: $name){
+        id
+   }
+}")
+
 (def test-statements (map str/trim (edn/read-string (slurp "test/graphql_builder/resources/statements.edn"))))
 
 (deftest generate-test
-  ;;test if we can recreate the same GraphQL source
-  (doseq [test-statement test-statements]
-    (is (= test-statement
-           (core/generated->graphql (core/generate (parse test-statement)))))))
+  (testing "if we can recreate the same graphql source"
+    (doseq [test-statement test-statements]
+      (is (= test-statement
+             (core/generated->graphql (core/generate (parse test-statement)))))))
+  (testing "several arguments can be apply to composed query"
+    (let [composed-fn (core/composed-query (parse composed-query-source-2)
+                                           {:jedi-hero "Hero"
+                                            :empire-hero "Hero"})
+          composed-query (composed-fn {:empire-hero {:episode "EMPIRE"}} {:jedi-hero {:episode "JEDI"}})]
+      (is (= 2 (count (get-in composed-query [:graphql :variables]))))))
+  (testing "several arguments can be apply to composed mutation"
+    (let [composed-fn (core/composed-mutation (parse composed-mutation-source)
+                                              {:add-starship-1 "AddStarship"
+                                               :add-starship-2 "AddStarship"})
+          composed-mutation (composed-fn {:add-starship-1 {:name "asd"}} {:add-starship-2 {:name "dsa"}})]
+      (is (= 2 (count (get-in composed-mutation [:graphql :variables])))))))
 
 (def inline-fragment-source "
 query LoadStarships($starshipCount: Int!) {
@@ -301,14 +328,6 @@ query ComposedQuery($LoadStarships1__starshipCount: Int!, $LoadStarships2__stars
     (is (= {:load-starships-1 {"foo" :bar}}
            (unpack {"LoadStarships1__foo" :bar})))))
 
-(def composed-query-source-2 "
-query Hero($episode: String!) {
-  hero(episode: $episode) {
-    name
-  }
-}
-")
-
 (def composed-query-result-2 "
 query ComposedQuery($JediHero__episode: String!, $EmpireHero__episode: String!) {
   JediHero__hero: hero(episode: $JediHero__episode) {
@@ -828,13 +847,6 @@ query Foo {
     (is (= (str/trim object-argument-parsing-source-2)
            (get-in (query-fn) [:graphql :query])))))
 
-(def composed-mutation-source "
-mutation AddStarship($name: String!){
-    addStarship(name: $name){
-        id
-   }
-}")
-
 (def composed-mutation-result "
 mutation ComposedMutation($AddStarship1__name: String!, $AddStarship2__name: String!) {
   AddStarship1__addStarship: addStarship(name: $AddStarship1__name) {