diff --git a/src/plugins/streamers/oasis/unit_tests/dbOASISReaderTests.cc b/src/plugins/streamers/oasis/unit_tests/dbOASISReaderTests.cc
index 3ef9f1dfe..9ecbf3937 100644
--- a/src/plugins/streamers/oasis/unit_tests/dbOASISReaderTests.cc
+++ b/src/plugins/streamers/oasis/unit_tests/dbOASISReaderTests.cc
@@ -595,6 +595,8 @@ TEST(Bug_1474)
     db::OASISReader reader (file);
     reader.read (layout);
     EXPECT_EQ (false, true);
+  } catch (tl::CancelException &ex) {
+    //  Seen when private test data is not installed
   } catch (tl::Exception &ex) {
     EXPECT_EQ (ex.msg (), "Cell named ADDHX2 with ID 4 was already given name SEDFFTRX2 (position=763169, cell=)");
   }
diff --git a/src/tl/tl/tlUnitTest.cc b/src/tl/tl/tlUnitTest.cc
index f6f1ef3d3..40497ecc8 100644
--- a/src/tl/tl/tlUnitTest.cc
+++ b/src/tl/tl/tlUnitTest.cc
@@ -104,6 +104,7 @@ std::string testdata_private ()
   std::string pp = tl::combine_path (tl::testsrc (), "private");
   pp = tl::combine_path (pp, "testdata");
   if (! tl::file_exists (pp)) {
+    tl::warn << "Cancelling test as private test data is not available.";
     throw tl::CancelException ();
   }
   return pp;