diff --git a/org.jacoco.core.test.validation.java5/src/org/jacoco/core/test/validation/java5/FinallyTest.java b/org.jacoco.core.test.validation.java5/src/org/jacoco/core/test/validation/java5/FinallyTest.java
index 0fee2fab0..40bf151bf 100644
--- a/org.jacoco.core.test.validation.java5/src/org/jacoco/core/test/validation/java5/FinallyTest.java
+++ b/org.jacoco.core.test.validation.java5/src/org/jacoco/core/test/validation/java5/FinallyTest.java
@@ -203,8 +203,7 @@ private Set<String> getTagsWithGotos() throws IOException {
 				continue;
 			}
 			int lineNumber = -1;
-			for (AbstractInsnNode i = m.instructions
-					.getFirst(); i != null; i = i.getNext()) {
+			for (AbstractInsnNode i : m.instructions) {
 				if (AbstractInsnNode.LINE == i.getType()) {
 					lineNumber = ((LineNumberNode) i).line;
 				}
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/MethodAnalyzer.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/MethodAnalyzer.java
index 77f9280ba..be02a3e38 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/MethodAnalyzer.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/MethodAnalyzer.java
@@ -47,10 +47,9 @@ public void accept(final MethodNode methodNode,
 		for (final TryCatchBlockNode n : methodNode.tryCatchBlocks) {
 			n.accept(methodVisitor);
 		}
-		currentNode = methodNode.instructions.getFirst();
-		while (currentNode != null) {
-			currentNode.accept(methodVisitor);
-			currentNode = currentNode.getNext();
+		for (final AbstractInsnNode i : methodNode.instructions) {
+			currentNode = i;
+			i.accept(methodVisitor);
 		}
 		methodVisitor.visitEnd();
 	}
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinGeneratedFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinGeneratedFilter.java
index 24db203a3..e8620f19e 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinGeneratedFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinGeneratedFilter.java
@@ -50,8 +50,7 @@ public void filter(final MethodNode methodNode,
 	}
 
 	private boolean hasLineNumber(final MethodNode methodNode) {
-		for (AbstractInsnNode i = methodNode.instructions
-				.getFirst(); i != null; i = i.getNext()) {
+		for (final AbstractInsnNode i : methodNode.instructions) {
 			if (AbstractInsnNode.LINE == i.getType()) {
 				return true;
 			}
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinInlineFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinInlineFilter.java
index 6c93298c5..9e7ebbe94 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinInlineFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinInlineFilter.java
@@ -47,8 +47,7 @@ public void filter(final MethodNode methodNode,
 		}
 
 		int line = 0;
-		for (AbstractInsnNode i = methodNode.instructions
-				.getFirst(); i != null; i = i.getNext()) {
+		for (final AbstractInsnNode i : methodNode.instructions) {
 			if (AbstractInsnNode.LINE == i.getType()) {
 				line = ((LineNumberNode) i).line;
 			}
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinLateinitFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinLateinitFilter.java
index 7ea86fefe..a510e637a 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinLateinitFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinLateinitFilter.java
@@ -25,9 +25,8 @@ public class KotlinLateinitFilter implements IFilter {
 	public void filter(final MethodNode methodNode,
 			final IFilterContext context, final IFilterOutput output) {
 		final Matcher matcher = new Matcher();
-		for (AbstractInsnNode i = methodNode.instructions
-				.getFirst(); i != null; i = i.getNext()) {
-			matcher.match(i, output);
+		for (final AbstractInsnNode node : methodNode.instructions) {
+			matcher.match(node, output);
 		}
 	}
 
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinNotNullOperatorFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinNotNullOperatorFilter.java
index 7d7e5bcc7..927c744ec 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinNotNullOperatorFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinNotNullOperatorFilter.java
@@ -25,8 +25,7 @@ public final class KotlinNotNullOperatorFilter implements IFilter {
 	public void filter(final MethodNode methodNode,
 			final IFilterContext context, final IFilterOutput output) {
 		final Matcher matcher = new Matcher();
-		for (AbstractInsnNode i = methodNode.instructions
-				.getFirst(); i != null; i = i.getNext()) {
+		for (final AbstractInsnNode i : methodNode.instructions) {
 			matcher.match(i, output);
 		}
 	}
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinUnsafeCastOperatorFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinUnsafeCastOperatorFilter.java
index 15d97e5b4..de6388865 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinUnsafeCastOperatorFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinUnsafeCastOperatorFilter.java
@@ -29,8 +29,7 @@ public final class KotlinUnsafeCastOperatorFilter implements IFilter {
 	public void filter(final MethodNode methodNode,
 			final IFilterContext context, final IFilterOutput output) {
 		final Matcher matcher = new Matcher();
-		for (AbstractInsnNode i = methodNode.instructions
-				.getFirst(); i != null; i = i.getNext()) {
+		for (final AbstractInsnNode i : methodNode.instructions) {
 			matcher.match(i, output);
 		}
 	}
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinWhenFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinWhenFilter.java
index 51de3bf6d..37c3ac3b0 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinWhenFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinWhenFilter.java
@@ -38,8 +38,7 @@ public final class KotlinWhenFilter implements IFilter {
 	public void filter(final MethodNode methodNode,
 			final IFilterContext context, final IFilterOutput output) {
 		final Matcher matcher = new Matcher();
-		for (AbstractInsnNode i = methodNode.instructions
-				.getFirst(); i != null; i = i.getNext()) {
+		for (final AbstractInsnNode i : methodNode.instructions) {
 			matcher.match(i, output);
 		}
 	}
@@ -93,7 +92,7 @@ private static void ignoreDefaultBranch(final AbstractInsnNode switchNode,
 			labels = ((TableSwitchInsnNode) switchNode).labels;
 		}
 		final Set<AbstractInsnNode> newTargets = new HashSet<AbstractInsnNode>();
-		for (LabelNode label : labels) {
+		for (final LabelNode label : labels) {
 			newTargets.add(AbstractMatcher.skipNonOpcodes(label));
 		}
 		output.replaceBranches(switchNode, newTargets);
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinWhenStringFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinWhenStringFilter.java
index b1b9b1ab6..45b2221e3 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinWhenStringFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/KotlinWhenStringFilter.java
@@ -33,8 +33,7 @@ public final class KotlinWhenStringFilter implements IFilter {
 	public void filter(final MethodNode methodNode,
 			final IFilterContext context, final IFilterOutput output) {
 		final Matcher matcher = new Matcher();
-		for (AbstractInsnNode i = methodNode.instructions
-				.getFirst(); i != null; i = i.getNext()) {
+		for (final AbstractInsnNode i : methodNode.instructions) {
 			matcher.match(i, output);
 		}
 	}
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/StringSwitchEcjFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/StringSwitchEcjFilter.java
index a0560b282..e9ee43ff7 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/StringSwitchEcjFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/StringSwitchEcjFilter.java
@@ -33,8 +33,7 @@ public final class StringSwitchEcjFilter implements IFilter {
 	public void filter(final MethodNode methodNode,
 			final IFilterContext context, final IFilterOutput output) {
 		final Matcher matcher = new Matcher();
-		for (AbstractInsnNode i = methodNode.instructions
-				.getFirst(); i != null; i = i.getNext()) {
+		for (final AbstractInsnNode i : methodNode.instructions) {
 			matcher.match(i, output);
 		}
 	}
diff --git a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/StringSwitchJavacFilter.java b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/StringSwitchJavacFilter.java
index 7ca08a1dc..cae34b54f 100644
--- a/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/StringSwitchJavacFilter.java
+++ b/org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/StringSwitchJavacFilter.java
@@ -27,10 +27,8 @@ public final class StringSwitchJavacFilter implements IFilter {
 
 	public void filter(final MethodNode methodNode,
 			final IFilterContext context, final IFilterOutput output) {
-		AbstractInsnNode i = methodNode.instructions.getFirst();
-		while (i != null) {
+		for (final AbstractInsnNode i : methodNode.instructions) {
 			filter(i, output);
-			i = i.getNext();
 		}
 	}