diff --git a/.trampolinerc b/.trampolinerc
index 677fcd4..493e8d7 100644
--- a/.trampolinerc
+++ b/.trampolinerc
@@ -21,7 +21,6 @@ pass_down_envvars+=(
     "AUTORELEASE_PR"
     "EXTRA_CI_ARGS"
     "KOKORO_GIT_COMMIT"
-    "KOKORO_KEYSTORE_DIR"
     "RELEASE_DRY_RUN"
     "RELEASE_PACKAGE"
     "RUBY_VERSIONS"
diff --git a/test/google/cloud/env/lazy_value_test.rb b/test/google/cloud/env/lazy_value_test.rb
index ff4fa00..bc2296c 100644
--- a/test/google/cloud/env/lazy_value_test.rb
+++ b/test/google/cloud/env/lazy_value_test.rb
@@ -260,9 +260,9 @@
 
     it "includes time elapsed in a retry delay" do
       count = 0
-      retries = Google::Cloud::Env::Retries.new max_tries: 3, initial_delay: 0.2, delay_includes_time_elapsed: true
+      retries = Google::Cloud::Env::Retries.new max_tries: 3, initial_delay: 0.39, delay_includes_time_elapsed: true
       cache = Google::Cloud::Env::LazyValue.new retries: retries do
-        sleep 0.1
+        sleep 0.2
         count += 1
         raise "whoops12" unless count >= 2
         12
@@ -277,7 +277,7 @@
       end
       assert_equal "whoops12", err2.message
       assert_equal 1, count
-      sleep 0.15
+      sleep 0.3
       assert_equal 12, cache.get
       assert_equal 2, count
       assert_equal 12, cache.get