diff --git a/src/main/java/io/github/swagger2markup/internal/document/builder/DefinitionsDocumentBuilder.java b/src/main/java/io/github/swagger2markup/internal/document/builder/DefinitionsDocumentBuilder.java
index c2d52b26..a564c781 100644
--- a/src/main/java/io/github/swagger2markup/internal/document/builder/DefinitionsDocumentBuilder.java
+++ b/src/main/java/io/github/swagger2markup/internal/document/builder/DefinitionsDocumentBuilder.java
@@ -109,11 +109,11 @@ public class DefinitionsDocumentBuilder extends MarkupDocumentBuilder {
                 if (checkThatDefinitionIsNotInIgnoreList(definitionName)) {
                     buildDefinition(definitionName, model);
                     if (logger.isInfoEnabled()) {
-                        logger.info("Definition processed : {}", definitionName);
+                        logger.info("Definition processed : '{}'", definitionName);
                     }
                 } else {
                     if (logger.isDebugEnabled()) {
-                        logger.debug("Definition was ignored : {}", definitionName);
+                        logger.debug("Definition was ignored : '{}'", definitionName);
                     }
                 }
             }
@@ -162,7 +162,7 @@ public class DefinitionsDocumentBuilder extends MarkupDocumentBuilder {
             Path definitionFile = outputPath.resolve(resolveDefinitionDocument(definitionName));
             defDocBuilder.writeToFileWithoutExtension(definitionFile, StandardCharsets.UTF_8);
             if (logger.isInfoEnabled()) {
-                logger.info("Separate definition file produced : {}", definitionFile);
+                logger.info("Separate definition file produced : '{}'", definitionFile);
             }
 
             definitionRef(definitionName, this.markupDocBuilder);
diff --git a/src/main/java/io/github/swagger2markup/internal/document/builder/PathsDocumentBuilder.java b/src/main/java/io/github/swagger2markup/internal/document/builder/PathsDocumentBuilder.java
index ba5e9477..c70da182 100644
--- a/src/main/java/io/github/swagger2markup/internal/document/builder/PathsDocumentBuilder.java
+++ b/src/main/java/io/github/swagger2markup/internal/document/builder/PathsDocumentBuilder.java
@@ -245,7 +245,7 @@ public class PathsDocumentBuilder extends MarkupDocumentBuilder {
             java.nio.file.Path operationFile = outputPath.resolve(resolveOperationDocument(operation));
              pathDocBuilder.writeToFileWithoutExtension(operationFile, StandardCharsets.UTF_8);
             if (logger.isInfoEnabled()) {
-                logger.info("Separate operation file produced : {}", operationFile);
+                logger.info("Separate operation file produced : '{}'", operationFile);
             }
 
             buildOperationRef(operation, this.markupDocBuilder);
@@ -255,7 +255,7 @@ public class PathsDocumentBuilder extends MarkupDocumentBuilder {
         }
 
         if (logger.isInfoEnabled()) {
-            logger.info("Operation processed : {} (normalized id = '{}')", operation, normalizeName(operation.getId()));
+            logger.info("Operation processed : '{}' (normalized id = '{}')", operation, normalizeName(operation.getId()));
         }
     }
 
diff --git a/src/test/java/io/github/swagger2markup/assertions/DiffUtils.java b/src/test/java/io/github/swagger2markup/assertions/DiffUtils.java
index 8d41b10b..02453465 100644
--- a/src/test/java/io/github/swagger2markup/assertions/DiffUtils.java
+++ b/src/test/java/io/github/swagger2markup/assertions/DiffUtils.java
@@ -38,7 +38,7 @@ public class DiffUtils {
             try (DirectoryStream<Path> directoryStream = Files.newDirectoryStream(expectedDirectory)) {
                 for (Path expectedFile : directoryStream) {
                     Path actualFile = actualDirectory.resolve(expectedFile.getFileName());
-                    LOGGER.info("Diffing file {} with {}", actualFile, expectedFile);
+                    LOGGER.info("Diffing file '{}' with '{}'", actualFile, expectedFile);
                     DiffAssertions.assertThat(actualFile).isEqualTo(expectedFile, reportPath);
                 }
             }
@@ -49,7 +49,7 @@ public class DiffUtils {
 
     public static void assertThatFileIsEqual(Path expectedFile, Path actualFile, String reportName) {
         Path reportPath = Paths.get("build/diff-report/", reportName);
-        LOGGER.info("Diffing file {} with {}", actualFile, expectedFile);
+        LOGGER.info("Diffing file '{}' with '{}'", actualFile, expectedFile);
         DiffAssertions.assertThat(actualFile).isEqualTo(expectedFile, reportPath);
     }
 }