diff --git a/.baseline/checkstyle/checkstyle.xml b/.baseline/checkstyle/checkstyle.xml
index 792229cfc..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]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
@@ -422,6 +424,7 @@
             <property name="allowEmptyMethods" value="true"/>
             <property name="allowEmptyTypes" value="true"/>
             <property name="allowEmptyLoops" value="true"/>
+            <property name="allowEmptyLambdas" value="true"/>
             <property name="ignoreEnhancedForColon" value="false"/>
             <message key="ws.notFollowed" value="WhitespaceAround: ''{0}'' is not followed by whitespace. Empty blocks may only be represented as '{}' when not part of a multi-block statement (4.1.3)"/>
             <message key="ws.notPreceded" value="WhitespaceAround: ''{0}'' is not preceded with whitespace."/>
@@ -435,7 +438,7 @@
         </module>
         <module name="CyclomaticComplexity"/> <!-- Java Coding Guidelines: Reduce Cyclomatic Complexity -->
         <module name="DesignForExtension"> <!-- Java Coding Guidelines: Design for extension -->
-            <property name="ignoredAnnotations" value="Test, Before, BeforeEach, After, AfterEach, BeforeClass, BeforeAll, AfterClass, AfterAll"/>
+            <property name="ignoredAnnotations" value="ParameterizedTest, Test, Before, BeforeEach, After, AfterEach, BeforeClass, BeforeAll, AfterClass, AfterAll"/>
         </module>
         <module name="JavadocMethod"> <!-- Java Style Guide: Where Javadoc is used -->
             <property name="scope" value="public"/>
@@ -468,7 +471,7 @@
         <module name="NestedTryDepth"/> <!-- Java Coding Guide: Try/catch blocks: never nested -->
         <module name="NonEmptyAtclauseDescription"/> <!-- Java Style Guide: At-clauses -->
         <module name="ParameterName"> <!-- Java Style Guide: Parameter names -->
-            <property name="format" value="^[a-z][a-zA-Z0-9]+$"/>
+            <property name="format" value="^_?[a-z][a-zA-Z0-9]+$"/>
             <message key="name.invalidPattern" value="Parameter name ''{0}'' must match pattern ''{1}''."/>
         </module>
         <module name="SingleLineJavadoc"/> <!-- Java Style Guide: General form -->
diff --git a/build.gradle b/build.gradle
index 7f744e89c..605a1431d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -28,7 +28,7 @@ buildscript {
         classpath 'com.netflix.nebula:gradle-info-plugin:5.1.1'
         classpath 'com.netflix.nebula:nebula-publishing-plugin:14.0.0'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
-        classpath 'com.palantir.baseline:gradle-baseline-java:0.65.0'
+        classpath 'com.palantir.baseline:gradle-baseline-java:2.26.0'
         classpath 'com.palantir.gradle.conjure:gradle-conjure:4.13.4'
         classpath 'com.palantir.gradle.gitversion:gradle-git-version:0.12.2'
         classpath 'gradle.plugin.org.inferred:gradle-processors:3.1.0'
diff --git a/conjure-python-core/src/main/java/com/palantir/conjure/python/PythonAliasTopologicalSorter.java b/conjure-python-core/src/main/java/com/palantir/conjure/python/PythonAliasTopologicalSorter.java
index 4a0514c6c..6e6a16089 100644
--- a/conjure-python-core/src/main/java/com/palantir/conjure/python/PythonAliasTopologicalSorter.java
+++ b/conjure-python-core/src/main/java/com/palantir/conjure/python/PythonAliasTopologicalSorter.java
@@ -90,7 +90,7 @@ static class AliasEdgeVisitor implements Type.Visitor<List<AliasSnippet>> {
         }
 
         @Override
-        public List<AliasSnippet> visitPrimitive(PrimitiveType value) {
+        public List<AliasSnippet> visitPrimitive(PrimitiveType _value) {
             return Collections.emptyList();
         }
 
@@ -126,7 +126,7 @@ public List<AliasSnippet> visitReference(TypeName value) {
         }
 
         @Override
-        public List<AliasSnippet> visitExternal(ExternalReference value) {
+        public List<AliasSnippet> visitExternal(ExternalReference _value) {
             return Collections.emptyList();
         }
 
diff --git a/conjure-python-core/src/test/java/com/palantir/conjure/python/ConjureSubfolderRunner.java b/conjure-python-core/src/test/java/com/palantir/conjure/python/ConjureSubfolderRunner.java
index 0f5eb7a03..bd7bbd219 100644
--- a/conjure-python-core/src/test/java/com/palantir/conjure/python/ConjureSubfolderRunner.java
+++ b/conjure-python-core/src/test/java/com/palantir/conjure/python/ConjureSubfolderRunner.java
@@ -149,7 +149,7 @@ private Optional<RunnerScheduler> maybeParallelScheduler(ParentFolder annotation
             @Override
             @SuppressWarnings("FutureReturnValueIgnored")
             public void schedule(Runnable childStatement) {
-                executor.submit(childStatement);
+                executor.execute(childStatement);
             }
 
             @Override
diff --git a/conjure-python/src/main/java/com/palantir/conjure/python/cli/ConjurePythonCli.java b/conjure-python/src/main/java/com/palantir/conjure/python/cli/ConjurePythonCli.java
index e77325f7f..55ac5de4a 100644
--- a/conjure-python/src/main/java/com/palantir/conjure/python/cli/ConjurePythonCli.java
+++ b/conjure-python/src/main/java/com/palantir/conjure/python/cli/ConjurePythonCli.java
@@ -29,7 +29,6 @@
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Paths;
-import java.util.List;
 import java.util.Optional;
 import picocli.CommandLine;
 
@@ -89,9 +88,7 @@ public static final class GenerateCommand implements Runnable {
                 description = "Generate a `conda_recipe/meta.yaml`")
         private boolean writeCondaRecipe;
 
-        @CommandLine.Unmatched
-        @SuppressWarnings("UnusedVariable")
-        private List<String> unmatchedOptions;
+
 
         @Override
         public void run() {