diff --git a/src/main/java/com/puppycrawl/tools/checkstyle/checks/coding/ModifiedControlVariableCheck.java b/src/main/java/com/puppycrawl/tools/checkstyle/checks/coding/ModifiedControlVariableCheck.java
index b210fd085..fb09cdcc3 100644
--- a/src/main/java/com/puppycrawl/tools/checkstyle/checks/coding/ModifiedControlVariableCheck.java
+++ b/src/main/java/com/puppycrawl/tools/checkstyle/checks/coding/ModifiedControlVariableCheck.java
@@ -364,7 +364,6 @@ public final class ModifiedControlVariableCheck extends Check {
      * @return set of variables initialized in for loop
      */
     private static Set<String> getForInitVariables(DetailAST ast) {
-        assert ast.getType() == TokenTypes.LITERAL_FOR;
         final Set<String> initializedVariables = new HashSet<>();
         final DetailAST forInitAST = ast.findFirstToken(TokenTypes.FOR_INIT);
 
diff --git a/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/ImportControlLoader.java b/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/ImportControlLoader.java
index e7a4845b1..389303838 100644
--- a/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/ImportControlLoader.java
+++ b/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/ImportControlLoader.java
@@ -87,12 +87,10 @@ final class ImportControlLoader extends AbstractLoader {
             stack.push(new PkgControl(pkg));
         }
         else if ("subpackage".equals(qName)) {
-            assert !stack.isEmpty();
             final String name = safeGet(atts, "name");
             stack.push(new PkgControl(stack.peek(), name));
         }
         else if ("allow".equals(qName) || "disallow".equals(qName)) {
-            assert !stack.isEmpty();
             // Need to handle either "pkg" or "class" attribute.
             // May have "exact-match" for "pkg"
             // May have "local-only"
@@ -122,7 +120,6 @@ final class ImportControlLoader extends AbstractLoader {
     public void endElement(final String namespaceURI, final String localName,
         final String qName) {
         if ("subpackage".equals(qName)) {
-            assert stack.size() > 1;
             stack.pop();
         }
     }
@@ -175,7 +172,6 @@ final class ImportControlLoader extends AbstractLoader {
      * @return the root {@link PkgControl} object loaded.
      */
     private PkgControl getRoot() {
-        assert stack.size() == 1;
         return stack.peek();
     }
 
diff --git a/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/PkgControl.java b/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/PkgControl.java
index ac61b5e4d..6ecede48a 100644
--- a/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/PkgControl.java
+++ b/src/main/java/com/puppycrawl/tools/checkstyle/checks/imports/PkgControl.java
@@ -46,7 +46,6 @@ class PkgControl {
      * @param pkgName the name of the package.
      */
     PkgControl(final String pkgName) {
-        assert pkgName != null;
         parent = null;
         fullPackage = pkgName;
     }
@@ -57,8 +56,6 @@ class PkgControl {
      * @param subPkg the sub package name.
      */
     PkgControl(final PkgControl parent, final String subPkg) {
-        assert parent != null;
-        assert subPkg != null;
         this.parent = parent;
         fullPackage = parent.getFullPackage() + "." + subPkg;
         parent.children.add(this);