diff --git a/test/clj_ml/data_test.clj b/test/clj_ml/data_test.clj
index b1f8e6c..b7beb17 100644
--- a/test/clj_ml/data_test.clj
+++ b/test/clj_ml/data_test.clj
@@ -139,11 +139,11 @@
 (deftest working-sequences-and-helpers
   (let [ds (make-dataset "test" [:a :b {:c [:d :e]}] [{:a 1 :b 2 :c nil} [4 nil :e]])]
     (is (= 2 (dataset-count ds)))
-    (is (= [{:a 1.0 :b 2.0 :c nil} {:a 4.0 :b nil :c "e"}] (dataset-as-maps ds)))
+    (is (= [{:a 1.0 :b 2.0 :c nil} {:a 4.0 :b nil :c :e}] (dataset-as-maps ds)))
     (is (= [{:weight 1.0} {:weight 1.0}] (map meta (dataset-as-maps ds))))
-    (is (= [[1.0 2.0 nil] [4.0 nil "e"]] (dataset-as-vecs ds)))
+    (is (= [[1.0 2.0 nil] [4.0 nil :e]] (dataset-as-vecs ds)))
     (is (= [{:weight 1.0} {:weight 1.0}] (map #(meta (instance-to-map %1)) (dataset-seq ds))))
-    (is (= [{:a 1.0 :b 2.0 :c nil} {:a 4.0 :b nil :c "e"}] (map #(instance-to-map %1) (dataset-seq ds))))))
+    (is (= [{:a 1.0 :b 2.0 :c nil} {:a 4.0 :b nil :c :e}] (map #(instance-to-map %1) (dataset-seq ds))))))
 
 (deftest dataset-instance-predicates
   (let [ds (make-dataset "test" [:a :b {:c [:d :e]}] [{:a 1 :b 2 :c :d} [4 5 :e]])
@@ -228,4 +228,4 @@
                           [2 :bar]
                           [3 :bar]
                           [4 :foo]])]
-    (is (= (dataset-as-vecs (take-dataset ds 2)) [[1.0 "foo"] [2.0 "bar"]]))))
+    (is (= (dataset-as-vecs (take-dataset ds 2)) [[1.0 :foo] [2.0 :bar]]))))
diff --git a/test/clj_ml/filters_test.clj b/test/clj_ml/filters_test.clj
index 0e14f6b..ce8b959 100644
--- a/test/clj_ml/filters_test.clj
+++ b/test/clj_ml/filters_test.clj
@@ -183,8 +183,10 @@
                                                 {:attributes [0] :counts true :lowercase true
                                                  :stemmer "weka.core.stemmers.SnowballStemmer -S English"}
                                                 ds)))
-           '({:world 1.0, :this 0.0, :test 1.0, :is 0.0, :hello 1.0, :dog 1.0, :cat 1.0, :a 0.0, :class "no"}
-             {:world 1.0, :this 1.0, :test 1.0, :is 2.0, :hello 0.0, :dog 0.0, :cat 0.0, :a 2.0, :class "yes"})))))
+           '({:world 1.0, :this 0.0, :test 1.0, :is 0.0, :hello 1.0,
+              :dog 1.0, :cat 1.0, :a 0.0, :class :no}
+             {:world 1.0, :this 1.0, :test 1.0, :is 2.0, :hello 0.0,
+              :dog 0.0, :cat 0.0, :a 2.0, :class :yes})))))
 
 (deftest make-apply-filter-add-attribute
   (let [ds (make-dataset :test [:a :b {:c [:g :m]}]
@@ -256,9 +258,9 @@
                                {:process inc-nums
                                 :determine-dataset-format rename-attributes} ds)]
     (is (= (map instance-to-map (dataset-seq res))
-           [{:foo 2.0 :bar 3.0 :c "g"}
-            {:foo 3.0 :bar 5.0 :c "m"}
-            {:foo 5.0 :bar 9.0 :c "g"}]))))
+           [{:foo 2.0 :bar 3.0 :c :g}
+            {:foo 3.0 :bar 5.0 :c :m}
+            {:foo 5.0 :bar 9.0 :c :g}]))))
 
 
 (deftest make-apply-filter-clj-batch