diff --git a/src/main/java/org/apache/commons/lang3/text/StrBuilder.java b/src/main/java/org/apache/commons/lang3/text/StrBuilder.java
index 2c4807c4c..8c2396083 100644
--- a/src/main/java/org/apache/commons/lang3/text/StrBuilder.java
+++ b/src/main/java/org/apache/commons/lang3/text/StrBuilder.java
@@ -2988,7 +2988,7 @@ public class StrBuilder implements CharSequence, Appendable, Serializable, Build
         /** {@inheritDoc} */
         @Override
         public int read() {
-            if (ready() == false) {
+            if (!ready()) {
                 return -1;
             }
             return StrBuilder.this.charAt(pos++);
diff --git a/src/main/java/org/apache/commons/lang3/text/StrSubstitutor.java b/src/main/java/org/apache/commons/lang3/text/StrSubstitutor.java
index bc528847a..b67685524 100644
--- a/src/main/java/org/apache/commons/lang3/text/StrSubstitutor.java
+++ b/src/main/java/org/apache/commons/lang3/text/StrSubstitutor.java
@@ -400,7 +400,7 @@ public class StrSubstitutor {
             return null;
         }
         final StrBuilder buf = new StrBuilder(source);
-        if (substitute(buf, 0, source.length()) == false) {
+        if (!substitute(buf, 0, source.length())) {
             return source;
         }
         return buf.toString();
@@ -423,7 +423,7 @@ public class StrSubstitutor {
             return null;
         }
         final StrBuilder buf = new StrBuilder(length).append(source, offset, length);
-        if (substitute(buf, 0, length) == false) {
+        if (!substitute(buf, 0, length)) {
             return source.substring(offset, offset + length);
         }
         return buf.toString();
@@ -640,7 +640,7 @@ public class StrSubstitutor {
             return false;
         }
         final StrBuilder buf = new StrBuilder(length).append(source, offset, length);
-        if (substitute(buf, 0, length) == false) {
+        if (!substitute(buf, 0, length)) {
             return false;
         }
         source.replace(offset, offset + length, buf.toString());
@@ -683,7 +683,7 @@ public class StrSubstitutor {
             return false;
         }
         final StrBuilder buf = new StrBuilder(length).append(source, offset, length);
-        if (substitute(buf, 0, length) == false) {
+        if (!substitute(buf, 0, length)) {
             return false;
         }
         source.replace(offset, offset + length, buf.toString());
@@ -896,7 +896,7 @@ public class StrSubstitutor {
      * @param priorVariables  the list of prior variables
      */
     private void checkCyclicSubstitution(final String varName, final List<String> priorVariables) {
-        if (priorVariables.contains(varName) == false) {
+        if (!priorVariables.contains(varName)) {
             return;
         }
         final StrBuilder buf = new StrBuilder(256);