diff --git a/e2e/bats/print.bash b/e2e/bats/print.bash
index 974897a6e4..a49c78cc41 100644
--- a/e2e/bats/print.bash
+++ b/e2e/bats/print.bash
@@ -22,6 +22,6 @@ teardown() {
     dfx build
     dfx canister install e2e_project
     dfx canister call e2e_project hello
-    run cat stderr.txt
-    assert_match "debug.print: Hello, World! from DFINITY"
+    run tail -2 stderr.txt
+    assert_match "Hello, World! from DFINITY"
 }
diff --git a/nix/sources.json b/nix/sources.json
index cda5328c05..e0473bacbc 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -32,9 +32,9 @@
         "type": "git"
     },
     "dfinity": {
+        "tag": "release-2020-08-28.RC00",
         "repo": "ssh://git@github.com/dfinity-lab/dfinity",
-        "rev": "4402d73e4470e8eccbe6b69b6218a9c098f4beb1",
-        "tag": "release-2020-08-17.RC00",
+        "rev": "9091dc6baa1bde728e96229294043650680dee33",
         "type": "git"
     },
     "ic-ref": {