diff --git a/pitest-entry/src/main/java/org/pitest/classpath/DefaultCodeSource.java b/pitest-entry/src/main/java/org/pitest/classpath/DefaultCodeSource.java
index b921d8f42..62ac04835 100644
--- a/pitest-entry/src/main/java/org/pitest/classpath/DefaultCodeSource.java
+++ b/pitest-entry/src/main/java/org/pitest/classpath/DefaultCodeSource.java
@@ -24,7 +24,7 @@ public DefaultCodeSource(final ProjectClassPaths classPath) {
                 classPath.getClassPath())));
     }
 
-    DefaultCodeSource(final ProjectClassPaths classPath,
+    public DefaultCodeSource(final ProjectClassPaths classPath,
                final Repository classRepository) {
         this.classPath = classPath;
         this.classRepository = classRepository;
diff --git a/pitest-entry/src/main/java/org/pitest/mutationtest/build/CompoundMutationInterceptor.java b/pitest-entry/src/main/java/org/pitest/mutationtest/build/CompoundMutationInterceptor.java
index c929c3d0d..d3a7fd73e 100644
--- a/pitest-entry/src/main/java/org/pitest/mutationtest/build/CompoundMutationInterceptor.java
+++ b/pitest-entry/src/main/java/org/pitest/mutationtest/build/CompoundMutationInterceptor.java
@@ -1,6 +1,7 @@
 package org.pitest.mutationtest.build;
 
 import org.pitest.bytecode.analysis.ClassTree;
+import org.pitest.classpath.CodeSource;
 import org.pitest.mutationtest.engine.Mutater;
 import org.pitest.mutationtest.engine.MutationDetails;
 
@@ -32,6 +33,11 @@ public CompoundMutationInterceptor filter(Predicate<MutationInterceptor> p) {
             .collect(Collectors.toList()));
   }
 
+  @Override
+  public void initialise(CodeSource code) {
+    this.children.forEach(each -> each.initialise(code));
+  }
+
   @Override
   public void begin(ClassTree clazz) {
     this.children.forEach(each -> each.begin(clazz));
diff --git a/pitest-entry/src/main/java/org/pitest/mutationtest/build/MutationInterceptor.java b/pitest-entry/src/main/java/org/pitest/mutationtest/build/MutationInterceptor.java
index bbfe0bba7..792094ddd 100644
--- a/pitest-entry/src/main/java/org/pitest/mutationtest/build/MutationInterceptor.java
+++ b/pitest-entry/src/main/java/org/pitest/mutationtest/build/MutationInterceptor.java
@@ -3,6 +3,7 @@
 import java.util.Collection;
 
 import org.pitest.bytecode.analysis.ClassTree;
+import org.pitest.classpath.CodeSource;
 import org.pitest.mutationtest.engine.Mutater;
 import org.pitest.mutationtest.engine.MutationDetails;
 
@@ -10,6 +11,14 @@ public interface MutationInterceptor {
 
   InterceptorType type();
 
+  /**
+   * Called once per instance prior to intercepting
+   * @param code Current code source
+   */
+  default void initialise(CodeSource code) {
+    // noop
+  }
+
   void begin(ClassTree clazz);
 
   Collection<MutationDetails> intercept(Collection<MutationDetails> mutations, Mutater m);
diff --git a/pitest-entry/src/main/java/org/pitest/mutationtest/tooling/MutationCoverage.java b/pitest-entry/src/main/java/org/pitest/mutationtest/tooling/MutationCoverage.java
index 786984cfe..befb7d349 100644
--- a/pitest-entry/src/main/java/org/pitest/mutationtest/tooling/MutationCoverage.java
+++ b/pitest-entry/src/main/java/org/pitest/mutationtest/tooling/MutationCoverage.java
@@ -358,6 +358,8 @@ private List<MutationAnalysisUnit> buildMutationTests(CoverageDatabase coverageD
             .createInterceptor(this.data, coverageData, bas)
             .filter(interceptorFilter);
 
+    interceptor.initialise(this.code);
+
     final MutationSource source = new MutationSource(mutationConfig, testPrioritiser, bas, interceptor);
 
     final MutationAnalyser analyser = new IncrementalAnalyser(
diff --git a/pitest-entry/src/test/java/org/pitest/mutationtest/build/CompoundMutationInterceptorTest.java b/pitest-entry/src/test/java/org/pitest/mutationtest/build/CompoundMutationInterceptorTest.java
index d2bee41eb..bba98d2d2 100644
--- a/pitest-entry/src/test/java/org/pitest/mutationtest/build/CompoundMutationInterceptorTest.java
+++ b/pitest-entry/src/test/java/org/pitest/mutationtest/build/CompoundMutationInterceptorTest.java
@@ -6,6 +6,9 @@
 import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
 import org.pitest.bytecode.analysis.ClassTree;
+import org.pitest.classpath.CodeSource;
+import org.pitest.classpath.DefaultCodeSource;
+import org.pitest.classpath.ProjectClassPaths;
 import org.pitest.mutationtest.engine.Mutater;
 import org.pitest.mutationtest.engine.MutationDetails;
 
@@ -51,6 +54,16 @@ public void setUp() {
     when(this.reportChild.type()).thenReturn(InterceptorType.REPORT);
   }
 
+  @Test
+  public void initialisesAllChildren() {
+    this.testee = new CompoundMutationInterceptor(Arrays.asList(this.modifyChild, this.filterChild));
+    final CodeSource source = new DefaultCodeSource(new ProjectClassPaths(null, null,null));
+
+    this.testee.initialise(source);
+    verify(this.modifyChild).initialise(source);
+    verify(this.filterChild).initialise(source);
+  }
+
   @Test
   public void shouldNotifyAllChildrenOfNewClass() {
     this.testee = new CompoundMutationInterceptor(Arrays.asList(this.modifyChild,this.filterChild));
diff --git a/pitest-entry/src/test/java/org/pitest/verifier/interceptors/Verifier.java b/pitest-entry/src/test/java/org/pitest/verifier/interceptors/Verifier.java
index 2b79a458c..0c53951cc 100644
--- a/pitest-entry/src/test/java/org/pitest/verifier/interceptors/Verifier.java
+++ b/pitest-entry/src/test/java/org/pitest/verifier/interceptors/Verifier.java
@@ -3,6 +3,8 @@
 import org.objectweb.asm.tree.AbstractInsnNode;
 import org.pitest.bytecode.analysis.ClassTree;
 import org.pitest.classinfo.ClassByteArraySource;
+import org.pitest.classinfo.Repository;
+import org.pitest.classpath.DefaultCodeSource;
 import org.pitest.mutationtest.build.MutationInterceptor;
 import org.pitest.mutationtest.engine.Mutater;
 import org.pitest.mutationtest.engine.MutationDetails;