diff --git a/tests/test_specs.py b/tests/test_specs.py
new file mode 100644
index 0000000..6c8c4b9
--- /dev/null
+++ b/tests/test_specs.py
@@ -0,0 +1,12 @@
+from imagekit.cachefiles import ImageCacheFile
+from nose.tools import assert_false
+from .imagegenerators import TestSpec
+
+
+def test_no_source():
+    """
+    Ensure sourceless specs are falsy.
+    """
+    spec = TestSpec(source=None)
+    file = ImageCacheFile(spec)
+    assert_false(bool(file))