diff --git a/test/test_to_string.cpp b/test/test_to_string.cpp
index 76e1c52d..84a42d61 100644
--- a/test/test_to_string.cpp
+++ b/test/test_to_string.cpp
@@ -287,6 +287,9 @@ namespace
 
       str.assign(STR("Result "));
       CHECK(etl::string<20>(STR("Result -12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left(), true));
+
+      str.assign(STR("Result "));
+      CHECK(etl::string<20>(STR("Result -0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left(), true));
     }
 
     //*************************************************************************
diff --git a/test/test_to_u16string.cpp b/test/test_to_u16string.cpp
index cd8ca3fb..215a44de 100644
--- a/test/test_to_u16string.cpp
+++ b/test/test_to_u16string.cpp
@@ -260,6 +260,9 @@ namespace
 
       CHECK(etl::u16string<20>(STR(" -12.345678")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).right()));
       CHECK(etl::u16string<20>(STR("-12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left()));
+
+      CHECK(etl::u16string<20>(STR(" -0.123456")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).right()));
+      CHECK(etl::u16string<20>(STR("-0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left()));
     }
 
     //*************************************************************************
@@ -278,6 +281,9 @@ namespace
 
       str.assign(STR("Result "));
       CHECK(etl::u16string<20>(STR("Result -12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left(), true));
+
+      str.assign(STR("Result "));
+      CHECK(etl::u16string<20>(STR("Result -0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left(), true));
     }
 
     //*************************************************************************
diff --git a/test/test_to_u32string.cpp b/test/test_to_u32string.cpp
index a45ac9c1..919a4153 100644
--- a/test/test_to_u32string.cpp
+++ b/test/test_to_u32string.cpp
@@ -263,6 +263,9 @@ namespace
 
       CHECK(etl::u32string<20>(STR(" -12.345678")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).right()));
       CHECK(etl::u32string<20>(STR("-12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left()));
+
+      CHECK(etl::u32string<20>(STR(" -0.123456")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).right()));
+      CHECK(etl::u32string<20>(STR("-0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left()));
     }
 
     //*************************************************************************
@@ -281,6 +284,9 @@ namespace
 
       str.assign(STR("Result "));
       CHECK(etl::u32string<20>(STR("Result -12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left(), true));
+
+      str.assign(STR("Result "));
+      CHECK(etl::u32string<20>(STR("Result -0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left(), true));
     }
 
     //*************************************************************************
diff --git a/test/test_to_wstring.cpp b/test/test_to_wstring.cpp
index 1d3ec8fc..1a99c62c 100644
--- a/test/test_to_wstring.cpp
+++ b/test/test_to_wstring.cpp
@@ -264,6 +264,9 @@ namespace
 
       CHECK(etl::wstring<20>(STR(" -12.345678")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).right()));
       CHECK(etl::wstring<20>(STR("-12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left()));
+
+      CHECK(etl::wstring<20>(STR(" -0.123456")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).right()));
+      CHECK(etl::wstring<20>(STR("-0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left()));
     }
 
     //*************************************************************************
@@ -282,6 +285,9 @@ namespace
 
       str.assign(STR("Result "));
       CHECK(etl::wstring<20>(STR("Result -12.345678 ")) == etl::to_string(-12.345678, str, Format().precision(6).width(11).left(), true));
+
+      str.assign(STR("Result "));
+      CHECK(etl::wstring<20>(STR("Result -0.123456 ")) == etl::to_string(-0.123456, str, Format().precision(6).width(10).left(), true));
     }
 
     //*************************************************************************