diff --git a/.kokoro/dependencies.sh b/.kokoro/dependencies.sh
new file mode 100755
index 000000000..8e909db98
--- /dev/null
+++ b/.kokoro/dependencies.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+cd github/google-http-java-client/
+
+# Print out Java
+java -version
+echo $JOB_TYPE
+
+export MAVEN_OPTS="-Xmx1024m -XX:MaxPermSize=128m"
+
+mvn install -DskipTests=true -B -V
+mvn -B dependency:analyze -DfailOnWarning=true
diff --git a/.kokoro/presubmit/dependencies.cfg b/.kokoro/presubmit/dependencies.cfg
new file mode 100644
index 000000000..b89a20740
--- /dev/null
+++ b/.kokoro/presubmit/dependencies.cfg
@@ -0,0 +1,12 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/google-http-java-client/.kokoro/dependencies.sh"
+}
diff --git a/google-http-client-apache-v2/pom.xml b/google-http-client-apache-v2/pom.xml
index c31000af4..15fdb2fc6 100644
--- a/google-http-client-apache-v2/pom.xml
+++ b/google-http-client-apache-v2/pom.xml
@@ -18,7 +18,6 @@
         <configuration>
           <links>
             <link>https://download.oracle.com/javase/7/docs/api/</link>
-            <link>https://jar-download.com/artifacts/org.codehaus.jackson/jackson-core-asl/${project.jackson-core-asl.version}/documentation</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
@@ -87,24 +86,18 @@
       <groupId>com.google.http-client</groupId>
       <artifactId>google-http-client</artifactId>
     </dependency>
-    <dependency>
-      <groupId>com.google.http-client</groupId>
-      <artifactId>google-http-client-test</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>com.google.guava</groupId>
-      <artifactId>guava</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.httpcomponents</groupId>
+      <artifactId>httpclient</artifactId>
     </dependency>
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
-      <artifactId>httpclient</artifactId>
+      <artifactId>httpcore</artifactId>
     </dependency>
     <dependency>
       <groupId>org.mockito</groupId>
diff --git a/google-http-client-appengine/pom.xml b/google-http-client-appengine/pom.xml
index 42dccf641..1c7f89d6a 100644
--- a/google-http-client-appengine/pom.xml
+++ b/google-http-client-appengine/pom.xml
@@ -48,6 +48,14 @@
           </signature>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-dependency-plugin</artifactId>
+        <configuration>
+          <!-- This artifact is needed by appengine-testing, but is not declared as a dependency -->
+          <ignoredUnusedDeclaredDependencies>com.google.appengine:appengine-api-stubs</ignoredUnusedDeclaredDependencies>
+        </configuration>
+      </plugin>
     </plugins>
   </build>
   <dependencies>
@@ -80,10 +88,5 @@
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>com.google.guava</groupId>
-      <artifactId>guava</artifactId>
-      <scope>test</scope>
-    </dependency>
   </dependencies>
 </project>
diff --git a/google-http-client-findbugs/pom.xml b/google-http-client-findbugs/pom.xml
index 5fab3c601..b6ed96eec 100644
--- a/google-http-client-findbugs/pom.xml
+++ b/google-http-client-findbugs/pom.xml
@@ -32,13 +32,17 @@
            <skip>true</skip>
          </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-dependency-plugin</artifactId>
+        <configuration>
+          <!-- This is needed for Javadoc linking, but is not used in the compiled bytecode -->
+          <ignoredUnusedDeclaredDependencies>com.google.http-client:google-http-client</ignoredUnusedDeclaredDependencies>
+        </configuration>
+      </plugin>
     </plugins>
   </build>
   <dependencies>
-    <dependency>
-      <groupId>com.google.http-client</groupId>
-      <artifactId>google-http-client</artifactId>
-    </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>findbugs</artifactId>
@@ -58,5 +62,14 @@
         </exclusion>
       </exclusions>
     </dependency>
+    <dependency>
+      <groupId>com.google.code.findbugs</groupId>
+      <artifactId>bcel-findbugs</artifactId>
+      <version>6.0</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.http-client</groupId>
+      <artifactId>google-http-client</artifactId>
+    </dependency>
   </dependencies>
 </project>
diff --git a/google-http-client-gson/pom.xml b/google-http-client-gson/pom.xml
index 871da6b75..d93727a7d 100644
--- a/google-http-client-gson/pom.xml
+++ b/google-http-client-gson/pom.xml
@@ -67,11 +67,6 @@
       <artifactId>google-http-client-test</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>com.google.code.gson</groupId>
       <artifactId>gson</artifactId>
diff --git a/google-http-client-jackson2/pom.xml b/google-http-client-jackson2/pom.xml
index 2f3af9abb..99ce3e5e3 100644
--- a/google-http-client-jackson2/pom.xml
+++ b/google-http-client-jackson2/pom.xml
@@ -67,11 +67,6 @@
       <artifactId>google-http-client-test</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-core</artifactId>
diff --git a/google-http-client/pom.xml b/google-http-client/pom.xml
index 1615ee91f..0365b7bb9 100644
--- a/google-http-client/pom.xml
+++ b/google-http-client/pom.xml
@@ -72,6 +72,10 @@
       <groupId>org.apache.httpcomponents</groupId>
       <artifactId>httpclient</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.apache.httpcomponents</groupId>
+      <artifactId>httpcore</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>
diff --git a/pom.xml b/pom.xml
index a2b5784d0..edf2ef59a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -147,6 +147,11 @@
         <artifactId>httpclient</artifactId>
         <version>${project.httpclient.version}</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.httpcomponents</groupId>
+        <artifactId>httpcore</artifactId>
+        <version>${project.httpcore.version}</version>
+      </dependency>
       <dependency>
         <groupId>com.google.guava</groupId>
         <artifactId>guava</artifactId>
@@ -357,6 +362,11 @@
           <artifactId>maven-site-plugin</artifactId>
           <version>3.7.1</version>
         </plugin>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-dependency-plugin</artifactId>
+          <version>3.1.1</version>
+        </plugin>
       </plugins>
     </pluginManagement>
     <plugins>
@@ -552,6 +562,7 @@
     <project.xpp3.version>1.1.4c</project.xpp3.version>
     <project.commons-logging.version>1.2</project.commons-logging.version>
     <project.httpclient.version>4.5.9</project.httpclient.version>
+    <project.httpcore.version>4.4.11</project.httpcore.version>
     <project.opencensus.version>0.21.0</project.opencensus.version>
     <project.root-directory>..</project.root-directory>
     <deploy.autorelease>false</deploy.autorelease>