diff --git a/.baseline/checkstyle/checkstyle.xml b/.baseline/checkstyle/checkstyle.xml
index f541b63e2..43ec38a3a 100644
--- a/.baseline/checkstyle/checkstyle.xml
+++ b/.baseline/checkstyle/checkstyle.xml
@@ -84,11 +84,13 @@
         <module name="AvoidStarImport"/> <!-- Java Style Guide: No wildcard imports -->
         <module name="AvoidStaticImport"> <!-- Java Style Guide: No static imports -->
             <property name="excludes" value="
+                com.google.common.base.Preconditions.*,
+                com.palantir.logsafe.Preconditions.*,
                 java.util.Collections.*,
                 java.util.stream.Collectors.*,
-                com.palantir.logsafe.Preconditions.*,
-                com.google.common.base.Preconditions.*,
-                org.apache.commons.lang3.Validate.*"/>
+                org.apache.commons.lang3.Validate.*,
+                org.assertj.core.api.Assertions.*,
+                org.mockito.Mockito.*"/>
         </module>
         <module name="ClassTypeParameterName"> <!-- Java Style Guide: Type variable names -->
             <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
diff --git a/build.gradle b/build.gradle
index 6441e96dc..a20380452 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,7 +27,7 @@ buildscript {
         classpath 'com.github.jengelman.gradle.plugins:shadow:5.1.0'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
         classpath 'com.netflix.nebula:nebula-publishing-plugin:13.6.1'
-        classpath 'com.palantir.baseline:gradle-baseline-java:2.10.1'
+        classpath 'com.palantir.baseline:gradle-baseline-java:2.17.0'
         classpath 'com.palantir.gradle.gitversion:gradle-git-version:0.12.2'
         classpath 'gradle.plugin.org.inferred:gradle-processors:3.1.0'
         classpath 'com.palantir.gradle.consistentversions:gradle-consistent-versions:1.12.4'
diff --git a/tracing-demos/src/test/java/com/palantir/tracing/TracingDemos.java b/tracing-demos/src/test/java/com/palantir/tracing/TracingDemos.java
index 151c921a6..6bf622af2 100644
--- a/tracing-demos/src/test/java/com/palantir/tracing/TracingDemos.java
+++ b/tracing-demos/src/test/java/com/palantir/tracing/TracingDemos.java
@@ -51,7 +51,7 @@ void handles_async_spans() throws Exception {
             Tracer.clearCurrentTrace(); // just pretending all these tasks are on a fresh request
 
             DetachedSpan crossThread = DetachedSpan.start("task-queue-time" + i);
-            executorService.submit(() -> {
+            executorService.execute(() -> {
                 try (CloseableSpan t = crossThread.completeAndStartChild("task" + i)) {
                     emit_nested_spans();
                     countDownLatch.countDown();
@@ -97,7 +97,7 @@ public void onFailure(Throwable _throwable) {
             });
 
             try (CloseableTracer root = CloseableTracer.startSpan("bbb")) {
-                executorService.submit(() -> {
+                executorService.execute(() -> {
                     future.set(null);
                 });
             }
@@ -124,7 +124,7 @@ void multi_producer_single_consumer() throws InterruptedException {
                 Tracer.clearCurrentTrace(); // just pretending all these tasks are on a fresh request
 
                 DetachedSpan span = DetachedSpan.start("callback-pending" + i + " (cross thread span)");
-                producerExecutorService.submit(() -> {
+                producerExecutorService.execute(() -> {
                     work.add(new QueuedWork() {
                         @Override
                         public String name() {
@@ -219,7 +219,7 @@ public void onFailure(Throwable _throwable) {
                     }
                 }, executor);
 
-        executor.submit(() -> {
+        executor.execute(() -> {
             future.set(null);
         });
 
diff --git a/tracing-test-utils/src/test/java/com/palantir/tracing/TestTracingExtensionDemo.java b/tracing-test-utils/src/test/java/com/palantir/tracing/TestTracingExtensionDemo.java
index d68ff5434..f8ccc9e9c 100644
--- a/tracing-test-utils/src/test/java/com/palantir/tracing/TestTracingExtensionDemo.java
+++ b/tracing-test-utils/src/test/java/com/palantir/tracing/TestTracingExtensionDemo.java
@@ -91,7 +91,7 @@ void handles_async_spans() throws Exception {
         IntStream.range(0, numTasks).forEach(i -> {
             DetachedSpan detachedSpan = DetachedSpan.start("task-queue-time" + i);
 
-            executorService.submit(() -> {
+            executorService.execute(() -> {
                 try (CloseableSpan closeableSpan = detachedSpan.completeAndStartChild("do-work-" + i)) {
                     prod_code();
                     countDownLatch.countDown();
diff --git a/tracing/src/test/java/com/palantir/tracing/TracerTest.java b/tracing/src/test/java/com/palantir/tracing/TracerTest.java
index e9d63cbe1..120185161 100644
--- a/tracing/src/test/java/com/palantir/tracing/TracerTest.java
+++ b/tracing/src/test/java/com/palantir/tracing/TracerTest.java
@@ -203,7 +203,7 @@ public void testTraceCopyIsIndependent() throws Exception {
         } finally {
             Tracer.fastCompleteSpan();
         }
-        assertThat(Tracer.completeSpan().isPresent()).isFalse();
+        assertThat(Tracer.completeSpan()).isNotPresent();
     }
 
     @Test
@@ -340,7 +340,7 @@ public void testCompleteRootSpanCompletesTrace() {
         } finally {
             Tracer.unsubscribe("traceIds");
         }
-        assertThat(traceIds.size()).isEqualTo(2);
+        assertThat(traceIds).hasSize(2);
     }
 
     @Test
diff --git a/tracing/src/test/java/com/palantir/tracing/TracersTest.java b/tracing/src/test/java/com/palantir/tracing/TracersTest.java
index f9aefb9ed..d5dfb219a 100644
--- a/tracing/src/test/java/com/palantir/tracing/TracersTest.java
+++ b/tracing/src/test/java/com/palantir/tracing/TracersTest.java
@@ -603,7 +603,7 @@ private static Callable<Void> traceExpectingCallableWithSingleSpan(String operat
             String traceId = Tracer.getTraceId();
             List<OpenSpan> trace = getCurrentTrace();
             OpenSpan span = trace.remove(trace.size() - 1);
-            assertThat(trace.size()).isEqualTo(0);
+            assertThat(trace).hasSize(0);
 
             assertThat(traceId).isEqualTo(outsideTraceId);
             assertThat(span.getOperation()).isEqualTo(operation);
@@ -619,7 +619,7 @@ private static Runnable traceExpectingRunnableWithSingleSpan(String operation) {
             String traceId = Tracer.getTraceId();
             List<OpenSpan> trace = getCurrentTrace();
             OpenSpan span = trace.remove(trace.size() - 1);
-            assertThat(trace.size()).isEqualTo(0);
+            assertThat(trace).hasSize(0);
 
             assertThat(traceId).isEqualTo(outsideTraceId);
             assertThat(span.getOperation()).isEqualTo(operation);