diff --git a/e2e/tests-dfx/canister_url.bash b/e2e/tests-dfx/canister_url.bash
index 974c64627e..cd5f6f03d3 100644
--- a/e2e/tests-dfx/canister_url.bash
+++ b/e2e/tests-dfx/canister_url.bash
@@ -4,7 +4,9 @@ load ../utils/_
 
 setup() {
   standard_setup
-
+  # some of the tests run on mainnet with default plaintext identity
+  # so we need to set this to avoid the error
+  export DFX_WARNING=-mainnet_plaintext_identity
   dfx_new_assets hello
 }
 
@@ -58,7 +60,7 @@ teardown() {
   echo "{}" > canister_ids.json
   jq '.hello_frontend.ic = "qsgof-4qaaa-aaaan-qekqq-cai"' canister_ids.json | sponge canister_ids.json
   frontend_id=$(dfx canister id hello_frontend --ic)
-  
+
   assert_command dfx canister url hello_frontend --ic
   assert_match "https://${frontend_id}.icp0.io"
 
diff --git a/e2e/tests-dfx/fabricate_cycles.bash b/e2e/tests-dfx/fabricate_cycles.bash
index 82f5c61da5..6d811adb03 100644
--- a/e2e/tests-dfx/fabricate_cycles.bash
+++ b/e2e/tests-dfx/fabricate_cycles.bash
@@ -39,6 +39,8 @@ teardown() {
 
 @test "ledger fabricate-cycles fails on real IC" {
   install_asset greet
+  # without DFX_WARNING, the command would fail with different error (Failed to create AgentEnvironment...)
+  export DFX_WARNING=-mainnet_plaintext_identity
   assert_command_fail dfx ledger fabricate-cycles --all --network ic
   assert_match "Cannot run this on the real IC."
   assert_command_fail dfx ledger fabricate-cycles --all --ic
diff --git a/e2e/tests-dfx/sign_send.bash b/e2e/tests-dfx/sign_send.bash
index b266510a1e..385d763a68 100644
--- a/e2e/tests-dfx/sign_send.bash
+++ b/e2e/tests-dfx/sign_send.bash
@@ -44,7 +44,8 @@ teardown() {
   cd "$E2E_TEMP_DIR"
   mkdir not-a-project-dir
   cd not-a-project-dir
-
+  # surpress the error
+  export DFX_WARNING=-mainnet_plaintext_identity
   assert_command dfx canister sign --query rwlgt-iiaaa-aaaaa-aaaaa-cai read --network ic
   assert_match "Query message generated at \[message.json\]"
 }