diff --git a/src/main/java/hudson/plugins/copyartifact/BuildSelectorParameter.java b/src/main/java/hudson/plugins/copyartifact/BuildSelectorParameter.java
index 6ac3f86d..6f132a3e 100644
--- a/src/main/java/hudson/plugins/copyartifact/BuildSelectorParameter.java
+++ b/src/main/java/hudson/plugins/copyartifact/BuildSelectorParameter.java
@@ -26,6 +26,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.logging.Logger;
+import java.util.stream.Collectors;
 
 import com.thoughtworks.xstream.XStreamException;
 import jenkins.model.Jenkins;
@@ -44,10 +45,6 @@
 import org.kohsuke.stapler.DataBoundConstructor;
 import org.kohsuke.stapler.StaplerRequest;
 
-import com.google.common.base.Predicate;
-import com.google.common.collect.Collections2;
-import com.google.common.collect.Lists;
-
 /**
  * @author Alan Harder
  */
@@ -150,14 +147,9 @@ public List<Descriptor<BuildSelector>> getAvailableBuildSelectorList() {
             if (jenkins == null) {
                 return Collections.emptyList();
             }
-            return Lists.newArrayList(Collections2.filter(
-                    jenkins.getDescriptorList(BuildSelector.class),
-                    new Predicate<Descriptor<BuildSelector>>() {
-                        public boolean apply(Descriptor<BuildSelector> input) {
-                            return !"ParameterizedBuildSelector".equals(input.clazz.getSimpleName());
-                        };
-                    }
-            ));
+            return jenkins.getDescriptorList(BuildSelector.class).stream()
+                    .filter(input -> !"ParameterizedBuildSelector".equals(input.clazz.getSimpleName()))
+                    .collect(Collectors.toList());
         }
         
         @Override
diff --git a/src/main/java/hudson/plugins/copyartifact/CopyArtifactPermissionProperty.java b/src/main/java/hudson/plugins/copyartifact/CopyArtifactPermissionProperty.java
index 9348275f..89184051 100644
--- a/src/main/java/hudson/plugins/copyartifact/CopyArtifactPermissionProperty.java
+++ b/src/main/java/hudson/plugins/copyartifact/CopyArtifactPermissionProperty.java
@@ -29,6 +29,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.regex.Pattern;
+import java.util.stream.Collectors;
 
 import javax.annotation.CheckForNull;
 
@@ -42,9 +43,6 @@
 import org.kohsuke.stapler.QueryParameter;
 import org.kohsuke.stapler.StaplerRequest;
 
-import com.google.common.base.Function;
-import com.google.common.collect.Lists;
-
 import hudson.Extension;
 import hudson.model.AutoCompletionCandidates;
 import hudson.model.Item;
@@ -127,11 +125,10 @@ public boolean canCopiedBy(Job<?,?> copier) {
         }
         
         List<String> literals = Arrays.asList(pattern.split("\\*", -1));
-        String regex = StringUtils.join(Lists.transform(literals, new Function<String, String>() {
-            public String apply(String input) {
-                return (input != null)?Pattern.quote(input):"";
-            }
-        }), ".*");
+        String regex =
+                literals.stream()
+                        .map(input -> input != null ? Pattern.quote(input) : "")
+                        .collect(Collectors.joining(".*"));
         return name.matches(regex);
     }
     
diff --git a/src/main/java/hudson/plugins/copyartifact/monitor/LegacyJobConfigMigrationMonitor.java b/src/main/java/hudson/plugins/copyartifact/monitor/LegacyJobConfigMigrationMonitor.java
index c32f08ed..a98f7ce3 100644
--- a/src/main/java/hudson/plugins/copyartifact/monitor/LegacyJobConfigMigrationMonitor.java
+++ b/src/main/java/hudson/plugins/copyartifact/monitor/LegacyJobConfigMigrationMonitor.java
@@ -24,7 +24,6 @@
 package hudson.plugins.copyartifact.monitor;
 
 import com.cloudbees.hudson.plugins.folder.computed.ComputedFolder;
-import com.google.common.annotations.VisibleForTesting;
 
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import hudson.BulkChange;
@@ -126,7 +125,8 @@ public boolean isActivated() {
     /**
      * @return data holding the list of jobs to warn.
      */
-    @VisibleForTesting LegacyMonitorData getData() {
+    @Restricted(NoExternalUse.class)
+    /* Visible for testing */ LegacyMonitorData getData() {
         return data;
     }
     
@@ -325,7 +325,7 @@ public HttpResponse doMigrateAllSelected(@JsonBody MigrateAllSelectedModel conte
         }
     }
 
-    @VisibleForTesting
+    /* Visible for testing */
     @Restricted(NoExternalUse.class)
     boolean applyAutoMigration(@Nonnull String jobFromName, @Nonnull String jobToName) throws IOException {
         Jenkins jenkins = Jenkins.get();
diff --git a/src/main/java/hudson/plugins/copyartifact/monitor/LegacyMonitorData.java b/src/main/java/hudson/plugins/copyartifact/monitor/LegacyMonitorData.java
index 8c419958..e81f7056 100644
--- a/src/main/java/hudson/plugins/copyartifact/monitor/LegacyMonitorData.java
+++ b/src/main/java/hudson/plugins/copyartifact/monitor/LegacyMonitorData.java
@@ -23,7 +23,6 @@
  */
 package hudson.plugins.copyartifact.monitor;
 
-import com.google.common.annotations.VisibleForTesting;
 import hudson.model.Job;
 import hudson.security.ACL;
 import hudson.security.ACLContext;
@@ -156,7 +155,7 @@ public void onJobRename(@Nonnull String previousFullName, @Nonnull String newFul
      * @return map map from the pair of jobs to the possible failure build.
      */
     @Restricted(NoExternalUse.class)
-    @VisibleForTesting @Nonnull Map<JobKey, LegacyBuildStorage> getLegacyJobInfos() {
+    /* Visible for testing */ @Nonnull Map<JobKey, LegacyBuildStorage> getLegacyJobInfos() {
         return new HashMap<>(legacyJobInfos);
     }
     
@@ -166,7 +165,7 @@ public void onJobRename(@Nonnull String previousFullName, @Nonnull String newFul
      * @return map map from the job name to all existing pair of jobs.
      */
     @Restricted(NoExternalUse.class)
-    @VisibleForTesting @Nonnull Map<String, List<JobKey>> getFullNameToKey() {
+    /* Visible for testing */ @Nonnull Map<String, List<JobKey>> getFullNameToKey() {
         Map<String, List<JobKey>> result = new HashMap<>();
         
         fullNameToKey.forEach((key, value) -> result.put(key, new ArrayList<>(value)));
@@ -180,7 +179,7 @@ public void onJobRename(@Nonnull String previousFullName, @Nonnull String newFul
      * Clear all.
      */
     @Restricted(NoExternalUse.class)
-    @VisibleForTesting void clear() {
+    /* Visible for testing */ void clear() {
         this.fullNameToKey.clear();
         this.legacyJobInfos.clear();
     }
@@ -327,7 +326,7 @@ private void removeEntryFromKeyMap(@Nonnull String fullName, @Nonnull JobKey key
      */
     @Restricted(NoExternalUse.class)
     @Nonnull
-    @VisibleForTesting static JobKey buildKey(@Nonnull String jobFrom, @Nonnull String jobTo) {
+    /* Visible for testing */ static JobKey buildKey(@Nonnull String jobFrom, @Nonnull String jobTo) {
         return new JobKey(jobFrom, jobTo);
     }
     
diff --git a/src/test/java/hudson/plugins/copyartifact/monitor/LegacyJobConfigMigrationMonitorTest.java b/src/test/java/hudson/plugins/copyartifact/monitor/LegacyJobConfigMigrationMonitorTest.java
index 85e53be0..b395efd4 100644
--- a/src/test/java/hudson/plugins/copyartifact/monitor/LegacyJobConfigMigrationMonitorTest.java
+++ b/src/test/java/hudson/plugins/copyartifact/monitor/LegacyJobConfigMigrationMonitorTest.java
@@ -43,6 +43,8 @@
 import hudson.plugins.copyartifact.testutils.CopyArtifactJenkinsRule;
 import hudson.plugins.copyartifact.testutils.FileWriteBuilder;
 import hudson.tasks.ArtifactArchiver;
+import java.util.Arrays;
+import java.util.HashSet;
 import jenkins.model.Jenkins;
 import jenkins.model.ParameterizedJobMixIn;
 import jenkins.security.QueueItemAuthenticator;
@@ -57,8 +59,6 @@
 import org.jvnet.hudson.test.MockAuthorizationStrategy;
 import org.jvnet.hudson.test.recipes.LocalData;
 
-import com.google.common.collect.Sets;
-
 import javax.annotation.CheckForNull;
 
 import static org.hamcrest.Matchers.hasSize;
@@ -831,7 +831,7 @@ public void remove_succeeded() throws Exception {
         LegacyJobConfigMigrationMonitor monitor = LegacyJobConfigMigrationMonitor.get();
         assertThat(
             monitor.getData().getFullNameToKey().keySet(),
-            Matchers.is(Sets.newHashSet("dest", "src"))
+            Matchers.is(new HashSet<>(Arrays.asList("dest", "src")))
         );
 
         src.addProperty(new CopyArtifactPermissionProperty("dest"));