diff --git a/src/core/Tools.cpp b/src/core/Tools.cpp
index 81fdd8e39..aa83305c4 100644
--- a/src/core/Tools.cpp
+++ b/src/core/Tools.cpp
@@ -138,7 +138,9 @@ namespace Tools
             i++;
         }
 
-        return QString("%1 %2").arg(QLocale().toString(size, 'f', precision), units.at(i));
+        // do not display decimals for smallest unit bytes identified by index i==0
+        const quint32 displayPrecision = (i == 0 ? 0 : precision);
+        return QString("%1 %2").arg(QLocale().toString(size, 'f', displayPrecision), units.at(i));
     }
 
     QString humanReadableTimeDifference(qint64 seconds)
diff --git a/tests/TestCli.cpp b/tests/TestCli.cpp
index 2d020a7d5..f3fa69d89 100644
--- a/tests/TestCli.cpp
+++ b/tests/TestCli.cpp
@@ -2113,7 +2113,7 @@ void TestCli::testShow()
                         "Tags: \n"
                         "\n"
                         "Attachments:\n"
-                        "  Sample attachment.txt (15.0 B)\n"));
+                        "  Sample attachment.txt (15 B)\n"));
 
     setInput("a");
     execCmd(showCmd, {"show", m_dbFile->fileName(), "--show-attachments", "/Homebanking/Subgroup/Subgroup Entry"});
diff --git a/tests/TestTools.cpp b/tests/TestTools.cpp
index 9aadfe0bf..f5c192f69 100644
--- a/tests/TestTools.cpp
+++ b/tests/TestTools.cpp
@@ -38,7 +38,7 @@ void TestTools::testHumanReadableFileSize()
     constexpr auto kibibyte = 1024u;
     using namespace Tools;
 
-    QCOMPARE(createDecimal("1", "00", "B"), humanReadableFileSize(1));
+    QCOMPARE(QString("1 B"), humanReadableFileSize(1));
     QCOMPARE(createDecimal("1", "00", "KiB"), humanReadableFileSize(kibibyte));
     QCOMPARE(createDecimal("1", "00", "MiB"), humanReadableFileSize(kibibyte * kibibyte));
     QCOMPARE(createDecimal("1", "00", "GiB"), humanReadableFileSize(kibibyte * kibibyte * kibibyte));