diff --git a/tests/test-p4fastimport-case-insensitive-rename.t b/tests/test-p4fastimport-case-insensitive-rename.t
index 6f3d040442..2a9ff81819 100644
--- a/tests/test-p4fastimport-case-insensitive-rename.t
+++ b/tests/test-p4fastimport-case-insensitive-rename.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport= " >> $HGRCPATH
 
diff --git a/tests/test-p4fastimport-case-insensitivity.t b/tests/test-p4fastimport-case-insensitivity.t
index f4c744cac0..e091bf6ef0 100644
--- a/tests/test-p4fastimport-case-insensitivity.t
+++ b/tests/test-p4fastimport-case-insensitivity.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport= " >> $HGRCPATH
 
diff --git a/tests/test-p4fastimport-criss-cross.t b/tests/test-p4fastimport-criss-cross.t
index 85a8262f45..8706ae33f7 100644
--- a/tests/test-p4fastimport-criss-cross.t
+++ b/tests/test-p4fastimport-criss-cross.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport= " >> $HGRCPATH
 
diff --git a/tests/test-p4fastimport-import-deletes.t b/tests/test-p4fastimport-import-deletes.t
index 15161ce5cb..d28ba9fb8b 100644
--- a/tests/test-p4fastimport-import-deletes.t
+++ b/tests/test-p4fastimport-import-deletes.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport= " >> $HGRCPATH
 
diff --git a/tests/test-p4fastimport-import-incremental.t b/tests/test-p4fastimport-import-incremental.t
index 38bf649c30..6dcd2c4d2e 100644
--- a/tests/test-p4fastimport-import-incremental.t
+++ b/tests/test-p4fastimport-import-incremental.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport= " >> $HGRCPATH
 
diff --git a/tests/test-p4fastimport-import-lfs.t b/tests/test-p4fastimport-import-lfs.t
index a01e38be31..e11cc2ab16 100644
--- a/tests/test-p4fastimport-import-lfs.t
+++ b/tests/test-p4fastimport-import-lfs.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport= " >> $HGRCPATH
   $ echo "lfs=" >> $HGRCPATH
diff --git a/tests/test-p4fastimport-import-modes.t b/tests/test-p4fastimport-import-modes.t
index 16f3dd5614..4f1e982392 100644
--- a/tests/test-p4fastimport-import-modes.t
+++ b/tests/test-p4fastimport-import-modes.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport= " >> $HGRCPATH
 
diff --git a/tests/test-p4fastimport-import-parallel.t b/tests/test-p4fastimport-import-parallel.t
index 060133ad29..41f0e291a5 100644
--- a/tests/test-p4fastimport-import-parallel.t
+++ b/tests/test-p4fastimport-import-parallel.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport=" >> $HGRCPATH
   $ echo "[p4fastimport]" >> $HGRCPATH
diff --git a/tests/test-p4fastimport-import.t b/tests/test-p4fastimport-import.t
index 37763ba151..950a3ee78f 100644
--- a/tests/test-p4fastimport-import.t
+++ b/tests/test-p4fastimport-import.t
@@ -1,5 +1,8 @@
 #require p4
 
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "p4fastimport= " >> $HGRCPATH