diff --git a/tests/test-dirstate-race.t b/tests/test-dirstate-race.t
--- a/tests/test-dirstate-race.t
+++ b/tests/test-dirstate-race.t
@@ -1,3 +1,11 @@
+#testcases dirstate-v1 dirstate-v1-tree
+
+#if dirstate-v1-tree
+#require rust
+  $ echo '[experimental]' >> $HGRCPATH
+  $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
+#endif
+
   $ hg init repo
   $ cd repo
   $ echo a > a
diff --git a/tests/test-dirstate-race2.t b/tests/test-dirstate-race2.t
--- a/tests/test-dirstate-race2.t
+++ b/tests/test-dirstate-race2.t
@@ -1,3 +1,11 @@
+#testcases dirstate-v1 dirstate-v1-tree
+
+#if dirstate-v1-tree
+#require rust
+  $ echo '[experimental]' >> $HGRCPATH
+  $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
+#endif
+
 Checking the size/permissions/file-type of files stored in the
 dirstate after an update where the files are changed concurrently
 outside of hg's control.
diff --git a/tests/test-dirstate.t b/tests/test-dirstate.t
--- a/tests/test-dirstate.t
+++ b/tests/test-dirstate.t
@@ -1,3 +1,11 @@
+#testcases dirstate-v1 dirstate-v1-tree
+
+#if dirstate-v1-tree
+#require rust
+  $ echo '[experimental]' >> $HGRCPATH
+  $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
+#endif
+
 ------ Test dirstate._dirs refcounting
 
   $ hg init t
diff --git a/tests/test-hgignore.t b/tests/test-hgignore.t
--- a/tests/test-hgignore.t
+++ b/tests/test-hgignore.t
@@ -1,3 +1,11 @@
+#testcases dirstate-v1 dirstate-v1-tree
+
+#if dirstate-v1-tree
+#require rust
+  $ echo '[experimental]' >> $HGRCPATH
+  $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
+#endif
+
   $ hg init ignorerepo
   $ cd ignorerepo
 
diff --git a/tests/test-permissions.t b/tests/test-permissions.t
--- a/tests/test-permissions.t
+++ b/tests/test-permissions.t
@@ -1,5 +1,13 @@
 #require unix-permissions no-root reporevlogstore
 
+#testcases dirstate-v1 dirstate-v1-tree
+
+#if dirstate-v1-tree
+#require rust
+  $ echo '[experimental]' >> $HGRCPATH
+  $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
+#endif
+
   $ hg init t
   $ cd t
 
diff --git a/tests/test-purge.t b/tests/test-purge.t
--- a/tests/test-purge.t
+++ b/tests/test-purge.t
@@ -1,3 +1,11 @@
+#testcases dirstate-v1 dirstate-v1-tree
+
+#if dirstate-v1-tree
+#require rust
+  $ echo '[experimental]' >> $HGRCPATH
+  $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
+#endif
+
 init
 
   $ hg init t
diff --git a/tests/test-status.t b/tests/test-status.t
--- a/tests/test-status.t
+++ b/tests/test-status.t
@@ -1,3 +1,11 @@
+#testcases dirstate-v1 dirstate-v1-tree
+
+#if dirstate-v1-tree
+#require rust
+  $ echo '[experimental]' >> $HGRCPATH
+  $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
+#endif
+
   $ hg init repo1
   $ cd repo1
   $ mkdir a b a/1 b/1 b/2
diff --git a/tests/test-symlinks.t b/tests/test-symlinks.t
--- a/tests/test-symlinks.t
+++ b/tests/test-symlinks.t
@@ -1,5 +1,13 @@
 #require symlink
 
+#testcases dirstate-v1 dirstate-v1-tree
+
+#if dirstate-v1-tree
+#require rust
+  $ echo '[experimental]' >> $HGRCPATH
+  $ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
+#endif
+
 == tests added in 0.7 ==
 
   $ hg init test-symlinks-0.7; cd test-symlinks-0.7;