diff --git a/test/kokoro.sh b/test/kokoro.sh
index d28d18cf..38ea41b2 100755
--- a/test/kokoro.sh
+++ b/test/kokoro.sh
@@ -13,6 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Deleting Ruby.
+rm -rf ~/.rvm
+
 set -e
 cd $(dirname $0)/..
 
diff --git a/tools/release/kokoro-electron.sh b/tools/release/kokoro-electron.sh
index c0302538..721b9c97 100755
--- a/tools/release/kokoro-electron.sh
+++ b/tools/release/kokoro-electron.sh
@@ -13,6 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Deleting Ruby.
+rm -rf ~/.rvm
+
 curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash
 export NVM_DIR="$HOME/.nvm"
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
diff --git a/tools/release/kokoro-grpc-tools.sh b/tools/release/kokoro-grpc-tools.sh
index b672c0cb..267d6cc2 100755
--- a/tools/release/kokoro-grpc-tools.sh
+++ b/tools/release/kokoro-grpc-tools.sh
@@ -13,6 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Deleting Ruby.
+rm -rf ~/.rvm
+
 set -e
 cd $(dirname $0)/../..
 base_dir=$(pwd)
diff --git a/tools/release/kokoro-nodejs.sh b/tools/release/kokoro-nodejs.sh
index e3dd3d05..7dd89c89 100755
--- a/tools/release/kokoro-nodejs.sh
+++ b/tools/release/kokoro-nodejs.sh
@@ -13,6 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Deleting Ruby.
+rm -rf ~/.rvm
+
 curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash
 export NVM_DIR="$HOME/.nvm"
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"