diff --git a/.kokoro/common.cfg b/.kokoro/common.cfg
index 570b6a4c..2269cf76 100644
--- a/.kokoro/common.cfg
+++ b/.kokoro/common.cfg
@@ -22,3 +22,23 @@ env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
     value: "github/nodejs-logging-bunyan/.kokoro/test.sh"
 }
+
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "nodejs"
+}
+
+###################################################
+
diff --git a/.kokoro/common_env_vars.cfg b/.kokoro/common_env_vars.cfg
new file mode 100644
index 00000000..803b0244
--- /dev/null
+++ b/.kokoro/common_env_vars.cfg
@@ -0,0 +1,19 @@
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "nodejs"
+}
+
+###################################################
+
diff --git a/.kokoro/continuous/node12/common.cfg b/.kokoro/continuous/node12/common.cfg
index 570b6a4c..2269cf76 100644
--- a/.kokoro/continuous/node12/common.cfg
+++ b/.kokoro/continuous/node12/common.cfg
@@ -22,3 +22,23 @@ env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
     value: "github/nodejs-logging-bunyan/.kokoro/test.sh"
 }
+
+
+#############################################
+# this section merged from .kokoro/common_env_vars.cfg using owlbot.py
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "nodejs"
+}
+
+###################################################
+
diff --git a/.kokoro/release/common.cfg b/.kokoro/release/common.cfg
index 3ba2eb09..02604bf1 100644
--- a/.kokoro/release/common.cfg
+++ b/.kokoro/release/common.cfg
@@ -6,3 +6,16 @@ before_action {
     }
   }
 }
+
+env_vars: {
+    key: "PRODUCT_AREA_LABEL"
+    value: "observability"
+}
+env_vars: {
+    key: "PRODUCT_LABEL"
+    value: "logging"
+}
+env_vars: {
+    key: "LANGUAGE_LABEL"
+    value: "nodejs"
+}
diff --git a/owlbot.py b/owlbot.py
index c1d79cdb..d79fcfb2 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import os
 import synthtool as s
 import synthtool.gcp as gcp
 import synthtool.languages.node as node
@@ -24,3 +25,23 @@
 templates = common_templates.node_library(source_location='build/src')
 s.move(templates, excludes=[".github/auto-label.yaml"])
 node.fix_hermetic()
+
+# --------------------------------------------------------------------------
+# Modify test configs
+# --------------------------------------------------------------------------
+
+# add shared environment variables to test configs
+s.move(
+    ".kokoro/common_env_vars.cfg",
+    ".kokoro/common.cfg",
+    merge=lambda src, dst, _, : f"{dst}\n{src}",
+)
+for path, subdirs, files in os.walk(f".kokoro/continuous"):
+    for name in files:
+        if name == "common.cfg":
+            file_path = os.path.join(path, name)
+            s.move(
+                ".kokoro/common_env_vars.cfg",
+                file_path,
+                merge=lambda src, dst, _, : f"{dst}\n{src}",
+            )