diff --git a/java-core/.kokoro/build.sh b/java-core/.kokoro/build.sh
index 372d331b7a..08abe50520 100755
--- a/java-core/.kokoro/build.sh
+++ b/java-core/.kokoro/build.sh
@@ -115,7 +115,7 @@ fi
 # fix output location of logs
 bash .kokoro/coerce_logs.sh
 
-if [[ "${ENABLE_BUILD_COP}" == "true" ]]
+if [[ "${ENABLE_FLAKYBOT}" == "true" ]]
 then
     chmod +x ${KOKORO_GFILE_DIR}/linux_amd64/flakybot
     ${KOKORO_GFILE_DIR}/linux_amd64/flakybot -repo=googleapis/java-core
diff --git a/java-core/.kokoro/nightly/integration.cfg b/java-core/.kokoro/nightly/integration.cfg
index 0048c8ece7..e51c7b4c6c 100644
--- a/java-core/.kokoro/nightly/integration.cfg
+++ b/java-core/.kokoro/nightly/integration.cfg
@@ -22,7 +22,7 @@ env_vars: {
 }
 
 env_vars: {
-  key: "ENABLE_BUILD_COP"
+  key: "ENABLE_FLAKYBOT"
   value: "true"
 }
 
diff --git a/java-core/.kokoro/nightly/samples.cfg b/java-core/.kokoro/nightly/samples.cfg
index f25429314f..9761fd8648 100644
--- a/java-core/.kokoro/nightly/samples.cfg
+++ b/java-core/.kokoro/nightly/samples.cfg
@@ -33,6 +33,6 @@ env_vars: {
 }
 
 env_vars: {
-  key: "ENABLE_BUILD_COP"
+  key: "ENABLE_FLAKYBOT"
   value: "true"
 }
diff --git a/java-core/synth.metadata b/java-core/synth.metadata
index 2d57825973..c3a8755261 100644
--- a/java-core/synth.metadata
+++ b/java-core/synth.metadata
@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-core.git",
-        "sha": "91822485ff4b85d6ebff52682a74ee5d022b8655"
+        "sha": "55f19b5095602e39b153fb55feb8c0ab33737944"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "1a2878d6909dd10ca4e3c1b5943d6622e996054e"
+        "sha": "ff01716e16d2c6e87eaf87197b753ac9fcbbed5d"
       }
     }
   ],