diff --git a/src/tests/IntegrationTests/Process/ProcessManagerIntegrationTests.cs b/src/tests/IntegrationTests/Process/ProcessManagerIntegrationTests.cs
index f1f6b77bbc3f771a73ba6e90d94f48b5815d3101..458e997e629ad9d0a1c78efc1141122e9663fece 100644
--- a/src/tests/IntegrationTests/Process/ProcessManagerIntegrationTests.cs
+++ b/src/tests/IntegrationTests/Process/ProcessManagerIntegrationTests.cs
@@ -57,8 +57,8 @@ namespace IntegrationTests
                     CommitID = "018997938335742f8be694240a7c2b352ec0835f",
                     Description = "Moving project files where they should be kept",
                     Summary = "Moving project files where they should be kept",
-                    TimeString = firstCommitTime.ToString(DateTimeFormatInfo.CurrentInfo),
-                    CommitTimeString = firstCommitTime.ToString(DateTimeFormatInfo.CurrentInfo),
+                    TimeString = firstCommitTime.ToString(Constants.Iso8601Format),
+                    CommitTimeString = firstCommitTime.ToString(Constants.Iso8601Format),
                 },
                 new GitLogEntry
                 {
@@ -75,8 +75,8 @@ namespace IntegrationTests
                     CommitID = "03939ffb3eb8486dba0259b43db00842bbe6eca1",
                     Description = "Initial Commit",
                     Summary = "Initial Commit",
-                    TimeString = secondCommitTime.ToString(DateTimeFormatInfo.CurrentInfo),
-                    CommitTimeString = secondCommitTime.ToString(DateTimeFormatInfo.CurrentInfo),
+                    TimeString = secondCommitTime.ToString(Constants.Iso8601Format),
+                    CommitTimeString = secondCommitTime.ToString(Constants.Iso8601Format),
                 },
             });
         }
@@ -110,8 +110,8 @@ namespace IntegrationTests
                     CommitID = "06d6451d351626894a30e9134f551db12c74254b",
                     Description = "Я люблю github",
                     Summary = "Я люблю github",
-                    TimeString = commitTime.ToString(DateTimeFormatInfo.CurrentInfo),
-                    CommitTimeString = commitTime.ToString(DateTimeFormatInfo.CurrentInfo),
+                    TimeString = commitTime.ToString(Constants.Iso8601Format),
+                    CommitTimeString = commitTime.ToString(Constants.Iso8601Format),
                 }
             });
         }
diff --git a/src/tests/UnitTests/IO/LogEntryOutputProcessorTests.cs b/src/tests/UnitTests/IO/LogEntryOutputProcessorTests.cs
index d2c0c4e7882b51b62e5aa5a2e07d58ef1b067eb5..04e5f58962f6a7e99962808e83859fb42d54385a 100644
--- a/src/tests/UnitTests/IO/LogEntryOutputProcessorTests.cs
+++ b/src/tests/UnitTests/IO/LogEntryOutputProcessorTests.cs
@@ -58,8 +58,8 @@ namespace UnitTests
                     },
                     Summary = "Rename RepositoryModelBase to RepositoryModel",
                     Description = "Rename RepositoryModelBase to RepositoryModel",
-                    TimeString = commitTime.ToString(DateTimeFormatInfo.CurrentInfo),
-                    CommitTimeString = commitTime.ToString(DateTimeFormatInfo.CurrentInfo),
+                    TimeString = commitTime.ToString(Constants.Iso8601Format),
+                    CommitTimeString = commitTime.ToString(Constants.Iso8601Format),
                 },
             };