diff --git a/shf-tests.mlb b/shf-tests.mlb
index 82ef7eb..d346a04 100644
--- a/shf-tests.mlb
+++ b/shf-tests.mlb
@@ -66,10 +66,11 @@ $(SML_LIB)/basis/mlton.mlb
 shell/exception-logger.sml
 test/Railroad/src/railroad.mlb
 
+test/persistent-vector-tests.sml
 test/regex-tests.sml
 test/test-utils.sml
-test/normal-move.sml
-test/normal-delete.sml
-test/normal-yank.sml
-test/regression.sml
+test/normal-move-tests.sml
+test/normal-delete-tests.sml
+test/normal-yank-tests.sml
+test/regression-tests.sml
 test/test.sml
diff --git a/test/normal-delete.sml b/test/normal-delete-tests.sml
similarity index 99%
rename from test/normal-delete.sml
rename to test/normal-delete-tests.sml
index a85689c..4dea247 100644
--- a/test/normal-delete.sml
+++ b/test/normal-delete-tests.sml
@@ -1,4 +1,4 @@
-structure NormalDelete =
+structure NormalDeleteTests =
 struct
   open Railroad
   open Railroad.Test
diff --git a/test/normal-move.sml b/test/normal-move-tests.sml
similarity index 99%
rename from test/normal-move.sml
rename to test/normal-move-tests.sml
index 1d203b7..52d5e3b 100644
--- a/test/normal-move.sml
+++ b/test/normal-move-tests.sml
@@ -1,4 +1,4 @@
-structure NormalMove =
+structure NormalMoveTests =
 struct
   open Railroad
   open Railroad.Test
diff --git a/test/normal-yank.sml b/test/normal-yank-tests.sml
similarity index 99%
rename from test/normal-yank.sml
rename to test/normal-yank-tests.sml
index 3d17f71..78d4661 100644
--- a/test/normal-yank.sml
+++ b/test/normal-yank-tests.sml
@@ -1,4 +1,4 @@
-structure NormalYank =
+structure NormalYankTests =
 struct
   open Railroad
   open Railroad.Test
diff --git a/test/persistent-vector-tests.sml b/test/persistent-vector-tests.sml
new file mode 100644
index 0000000..28cb18b
--- /dev/null
+++ b/test/persistent-vector-tests.sml
@@ -0,0 +1 @@
+structure PersistentVectorTests = struct val tests = [] end
diff --git a/test/regression.sml b/test/regression-tests.sml
similarity index 98%
rename from test/regression.sml
rename to test/regression-tests.sml
index d3c4c79..823ad3c 100644
--- a/test/regression.sml
+++ b/test/regression-tests.sml
@@ -1,4 +1,4 @@
-structure Regression =
+structure RegressionTests =
 struct
   open Railroad
   open Railroad.Test
diff --git a/test/test.sml b/test/test.sml
index e4992ba..bf93e53 100644
--- a/test/test.sml
+++ b/test/test.sml
@@ -6,10 +6,11 @@ struct
   fun main () =
     let
       val tests = List.concat
-        [ NormalMove.tests
-        , NormalDelete.tests
-        , NormalYank.tests
-        , Regression.tests
+        [ NormalMoveTests.tests
+        , NormalDeleteTests.tests
+        , NormalYankTests.tests
+        , PersistentVectorTests.tests
+        , RegressionTests.tests
         , RegexTests.tests
         ]
       val tests = concat tests