diff --git a/tests/test_color.py b/tests/test_color.py
new file mode 100644
index 0000000..4dd1b01
--- /dev/null
+++ b/tests/test_color.py
@@ -0,0 +1,10 @@
+import testenv
+from papers import color
+
+def perf_color():
+    s = str(range(1000))
+    for _ in range(5000000):
+        color.dye(s, color.red)
+
+if __name__ == '__main__':
+    perf_color()
\ No newline at end of file
diff --git a/tests/testenv.py b/tests/testenv.py
new file mode 100644
index 0000000..bacd731
--- /dev/null
+++ b/tests/testenv.py
@@ -0,0 +1,3 @@
+# Adjusting paths.
+import os, sys
+sys.path.insert(0, os.path.abspath(os.path.join(__file__, '../..')))
\ No newline at end of file