diff --git a/testing/ci/e2e.sh b/testing/ci/e2e.sh
index 05585753..3c25fb96 100755
--- a/testing/ci/e2e.sh
+++ b/testing/ci/e2e.sh
@@ -22,7 +22,7 @@ while ! curl 127.0.0.1:3030/status; do
   sleep 1
 done
 
-while ! curl 127.0.0.1:9545; do
+while ! curl localhost:9545; do
   sleep 1
 done
 
diff --git a/testing/ci/e2e_deploy_contract.sh b/testing/ci/e2e_deploy_contract.sh
index 6bab28e3..c3b4dd55 100755
--- a/testing/ci/e2e_deploy_contract.sh
+++ b/testing/ci/e2e_deploy_contract.sh
@@ -22,7 +22,7 @@ while ! curl 127.0.0.1:3030; do
   sleep 1
 done
 
-while ! curl 127.0.0.1:9545; do
+while ! curl localhost:9545; do
   sleep 1
 done
 
diff --git a/testing/ci/test_challenge.sh b/testing/ci/test_challenge.sh
index 7deb52df..45462b70 100755
--- a/testing/ci/test_challenge.sh
+++ b/testing/ci/test_challenge.sh
@@ -23,7 +23,7 @@ while ! curl 127.0.0.1:3030; do
   sleep 1
 done
 
-while ! curl 127.0.0.1:9545; do
+while ! curl localhost:9545; do
   sleep 1
 done
 
diff --git a/testing/ci/test_ethrelay_catchup.sh b/testing/ci/test_ethrelay_catchup.sh
index 912a3617..0f23d4ae 100755
--- a/testing/ci/test_ethrelay_catchup.sh
+++ b/testing/ci/test_ethrelay_catchup.sh
@@ -24,7 +24,7 @@ while ! curl 127.0.0.1:3030; do
   sleep 1
 done
 
-while ! curl 127.0.0.1:9545; do
+while ! curl localhost:9545; do
   sleep 1
 done
 
diff --git a/testing/ci/test_npm_package.sh b/testing/ci/test_npm_package.sh
index 4e02e11a..9aefaa7b 100755
--- a/testing/ci/test_npm_package.sh
+++ b/testing/ci/test_npm_package.sh
@@ -37,7 +37,7 @@ while ! curl 127.0.0.1:3030; do
   sleep 1
 done
 
-while ! curl 127.0.0.1:9545; do
+while ! curl localhost:9545; do
   sleep 1
 done