diff --git a/confext/confParser_test.go b/confext/confParser_test.go
index 967c6ad..c2fdbd8 100644
--- a/confext/confParser_test.go
+++ b/confext/confParser_test.go
@@ -2,6 +2,7 @@ package confext
 
 import (
 	"gogs.mikescher.com/BlackForestBytes/goext/timeext"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
 	"testing"
 	"time"
 )
@@ -41,13 +42,13 @@ func TestApplyEnvOverridesNoop(t *testing.T) {
 
 	output := input
 
-	err := ApplyEnvOverrides(&output, ".")
+	err := ApplyEnvOverrides("", &output, ".")
 	if err != nil {
 		t.Errorf("%v", err)
 		t.FailNow()
 	}
 
-	assertEqual(t, input, output)
+	tst.AssertEqual(t, input, output)
 }
 
 func TestApplyEnvOverridesSimple(t *testing.T) {
@@ -93,21 +94,21 @@ func TestApplyEnvOverridesSimple(t *testing.T) {
 	t.Setenv("TEST_V8", "1min4s")
 	t.Setenv("TEST_V9", "2009-11-10T23:00:00Z")
 
-	err := ApplyEnvOverrides(&data, ".")
+	err := ApplyEnvOverrides("", &data, ".")
 	if err != nil {
 		t.Errorf("%v", err)
 		t.FailNow()
 	}
 
-	assertEqual(t, data.V1, 846)
-	assertEqual(t, data.V2, "hello_world")
-	assertEqual(t, data.V3, 6)
-	assertEqual(t, data.V4, 333)
-	assertEqual(t, data.V5, -937)
-	assertEqual(t, data.V6, 70)
-	assertEqual(t, data.V7, "AAAAAA")
-	assertEqual(t, data.V8, time.Second*64)
-	assertEqual(t, data.V9, time.Unix(1257894000, 0).UTC())
+	tst.AssertEqual(t, data.V1, 846)
+	tst.AssertEqual(t, data.V2, "hello_world")
+	tst.AssertEqual(t, data.V3, 6)
+	tst.AssertEqual(t, data.V4, 333)
+	tst.AssertEqual(t, data.V5, -937)
+	tst.AssertEqual(t, data.V6, 70)
+	tst.AssertEqual(t, data.V7, "AAAAAA")
+	tst.AssertEqual(t, data.V8, time.Second*64)
+	tst.AssertEqual(t, data.V9, time.Unix(1257894000, 0).UTC())
 }
 
 func TestApplyEnvOverridesRecursive(t *testing.T) {
@@ -182,35 +183,35 @@ func TestApplyEnvOverridesRecursive(t *testing.T) {
 	t.Setenv("SUB_V3", "33min")
 	t.Setenv("SUB_V4", "2044-01-01T00:00:00Z")
 
-	err := ApplyEnvOverrides(&data, "_")
+	err := ApplyEnvOverrides("", &data, "_")
 	if err != nil {
 		t.Errorf("%v", err)
 		t.FailNow()
 	}
 
-	assertEqual(t, data.V1, 999)
-	assertEqual(t, data.VX, "2")
-	assertEqual(t, data.V5, "no")
-	assertEqual(t, data.Sub1.V1, 3)
-	assertEqual(t, data.Sub1.VX, "4")
-	assertEqual(t, data.Sub1.V2, "5")
-	assertEqual(t, data.Sub1.V8, time.Second*6)
-	assertEqual(t, data.Sub1.V9, time.Unix(947206861, 0).UTC())
-	assertEqual(t, data.Sub2.V1, 846)
-	assertEqual(t, data.Sub2.VX, "9")
-	assertEqual(t, data.Sub2.V2, "222_hello_world")
-	assertEqual(t, data.Sub2.V8, time.Second*64)
-	assertEqual(t, data.Sub2.V9, time.Unix(1257894000, 0).UTC())
-	assertEqual(t, data.Sub3.V1, 33846)
-	assertEqual(t, data.Sub3.VX, "14")
-	assertEqual(t, data.Sub3.V2, "33_hello_world")
-	assertEqual(t, data.Sub3.V8, time.Second*1984)
-	assertEqual(t, data.Sub3.V9, time.Unix(2015276400, 0).UTC())
-	assertEqual(t, data.Sub4.V1, 11)
-	assertEqual(t, data.Sub4.VX, "19")
-	assertEqual(t, data.Sub4.V2, "22")
-	assertEqual(t, data.Sub4.V8, time.Second*1980)
-	assertEqual(t, data.Sub4.V9, time.Unix(2335219200, 0).UTC())
+	tst.AssertEqual(t, data.V1, 999)
+	tst.AssertEqual(t, data.VX, "2")
+	tst.AssertEqual(t, data.V5, "no")
+	tst.AssertEqual(t, data.Sub1.V1, 3)
+	tst.AssertEqual(t, data.Sub1.VX, "4")
+	tst.AssertEqual(t, data.Sub1.V2, "5")
+	tst.AssertEqual(t, data.Sub1.V8, time.Second*6)
+	tst.AssertEqual(t, data.Sub1.V9, time.Unix(947206861, 0).UTC())
+	tst.AssertEqual(t, data.Sub2.V1, 846)
+	tst.AssertEqual(t, data.Sub2.VX, "9")
+	tst.AssertEqual(t, data.Sub2.V2, "222_hello_world")
+	tst.AssertEqual(t, data.Sub2.V8, time.Second*64)
+	tst.AssertEqual(t, data.Sub2.V9, time.Unix(1257894000, 0).UTC())
+	tst.AssertEqual(t, data.Sub3.V1, 33846)
+	tst.AssertEqual(t, data.Sub3.VX, "14")
+	tst.AssertEqual(t, data.Sub3.V2, "33_hello_world")
+	tst.AssertEqual(t, data.Sub3.V8, time.Second*1984)
+	tst.AssertEqual(t, data.Sub3.V9, time.Unix(2015276400, 0).UTC())
+	tst.AssertEqual(t, data.Sub4.V1, 11)
+	tst.AssertEqual(t, data.Sub4.VX, "19")
+	tst.AssertEqual(t, data.Sub4.V2, "22")
+	tst.AssertEqual(t, data.Sub4.V8, time.Second*1980)
+	tst.AssertEqual(t, data.Sub4.V9, time.Unix(2335219200, 0).UTC())
 }
 
 func TestApplyEnvOverridesPointer(t *testing.T) {
@@ -244,21 +245,21 @@ func TestApplyEnvOverridesPointer(t *testing.T) {
 	t.Setenv("TEST_V8", "1min4s")
 	t.Setenv("TEST_V9", "2009-11-10T23:00:00Z")
 
-	err := ApplyEnvOverrides(&data, ".")
+	err := ApplyEnvOverrides("", &data, ".")
 	if err != nil {
 		t.Errorf("%v", err)
 		t.FailNow()
 	}
 
-	assertPtrEqual(t, data.V1, 846)
-	assertPtrEqual(t, data.V2, "hello_world")
-	assertPtrEqual(t, data.V3, 6)
-	assertPtrEqual(t, data.V4, 333)
-	assertPtrEqual(t, data.V5, -937)
-	assertPtrEqual(t, data.V6, 70)
-	assertPtrEqual(t, data.V7, "AAAAAA")
-	assertPtrEqual(t, data.V8, time.Second*64)
-	assertPtrEqual(t, data.V9, time.Unix(1257894000, 0).UTC())
+	tst.AssertDeRefEqual(t, data.V1, 846)
+	tst.AssertDeRefEqual(t, data.V2, "hello_world")
+	tst.AssertDeRefEqual(t, data.V3, 6)
+	tst.AssertDeRefEqual(t, data.V4, 333)
+	tst.AssertDeRefEqual(t, data.V5, -937)
+	tst.AssertDeRefEqual(t, data.V6, 70)
+	tst.AssertDeRefEqual(t, data.V7, "AAAAAA")
+	tst.AssertDeRefEqual(t, data.V8, time.Second*64)
+	tst.AssertDeRefEqual(t, data.V9, time.Unix(1257894000, 0).UTC())
 }
 
 func assertEqual[T comparable](t *testing.T, actual T, expected T) {
diff --git a/cryptext/aes_test.go b/cryptext/aes_test.go
index 3954537..7bd2d90 100644
--- a/cryptext/aes_test.go
+++ b/cryptext/aes_test.go
@@ -2,6 +2,7 @@ package cryptext
 
 import (
 	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
 	"testing"
 )
 
@@ -23,13 +24,13 @@ func TestEncryptAESSimple(t *testing.T) {
 		panic(err)
 	}
 
-	assertEqual(t, string(str1), string(str3))
+	tst.AssertEqual(t, string(str1), string(str3))
 
 	str4, err := EncryptAESSimple(pw, str3, 512)
 	if err != nil {
 		panic(err)
 	}
 
-	assertNotEqual(t, string(str2), string(str4))
+	tst.AssertNotEqual(t, string(str2), string(str4))
 
 }
diff --git a/cryptext/hash_test.go b/cryptext/hash_test.go
index 421b2ed..14bcd72 100644
--- a/cryptext/hash_test.go
+++ b/cryptext/hash_test.go
@@ -1,31 +1,20 @@
 package cryptext
 
 import (
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
 	"testing"
 )
 
 func TestStrSha256(t *testing.T) {
-	assertEqual(t, StrSha256(""), "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
-	assertEqual(t, StrSha256("0"), "5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9")
-	assertEqual(t, StrSha256("80085"), "b3786e141d65638ad8a98173e26b5f6a53c927737b23ff31fb1843937250f44b")
-	assertEqual(t, StrSha256("Hello World"), "a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e")
+	tst.AssertEqual(t, StrSha256(""), "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
+	tst.AssertEqual(t, StrSha256("0"), "5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9")
+	tst.AssertEqual(t, StrSha256("80085"), "b3786e141d65638ad8a98173e26b5f6a53c927737b23ff31fb1843937250f44b")
+	tst.AssertEqual(t, StrSha256("Hello World"), "a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e")
 }
 
 func TestBytesSha256(t *testing.T) {
-	assertEqual(t, BytesSha256([]byte{}), "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
-	assertEqual(t, BytesSha256([]byte{0}), "6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d")
-	assertEqual(t, BytesSha256([]byte{128}), "76be8b528d0075f7aae98d6fa57a6d3c83ae480a8469e668d7b0af968995ac71")
-	assertEqual(t, BytesSha256([]byte{0, 1, 2, 4, 8, 16, 32, 64, 128, 255}), "55016a318ba538e00123c736b2a8b6db368d00e7e25727547655b653e5853603")
-}
-
-func assertEqual(t *testing.T, actual string, expected string) {
-	if actual != expected {
-		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actual, expected)
-	}
-}
-
-func assertNotEqual(t *testing.T, actual string, expected string) {
-	if actual == expected {
-		t.Errorf("values do not differ: Actual: '%v', Expected: '%v'", actual, expected)
-	}
+	tst.AssertEqual(t, BytesSha256([]byte{}), "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
+	tst.AssertEqual(t, BytesSha256([]byte{0}), "6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d")
+	tst.AssertEqual(t, BytesSha256([]byte{128}), "76be8b528d0075f7aae98d6fa57a6d3c83ae480a8469e668d7b0af968995ac71")
+	tst.AssertEqual(t, BytesSha256([]byte{0, 1, 2, 4, 8, 16, 32, 64, 128, 255}), "55016a318ba538e00123c736b2a8b6db368d00e7e25727547655b653e5853603")
 }
diff --git a/dataext/merge_test.go b/dataext/merge_test.go
index f5b1031..76a58c5 100644
--- a/dataext/merge_test.go
+++ b/dataext/merge_test.go
@@ -2,6 +2,7 @@ package dataext
 
 import (
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
 	"testing"
 )
 
@@ -43,10 +44,10 @@ func TestObjectMerge(t *testing.T) {
 
 	valueMerge := ObjectMerge(valueA, valueB)
 
-	assertPtrEqual(t, "Field1", valueMerge.Field1, valueB.Field1)
-	assertPtrEqual(t, "Field2", valueMerge.Field2, valueA.Field2)
-	assertPtrEqual(t, "Field3", valueMerge.Field3, valueB.Field3)
-	assertPtrEqual(t, "Field4", valueMerge.Field4, nil)
+	tst.AssertIdentPtrEqual(t, "Field1", valueMerge.Field1, valueB.Field1)
+	tst.AssertIdentPtrEqual(t, "Field2", valueMerge.Field2, valueA.Field2)
+	tst.AssertIdentPtrEqual(t, "Field3", valueMerge.Field3, valueB.Field3)
+	tst.AssertIdentPtrEqual(t, "Field4", valueMerge.Field4, nil)
 
 }
 
diff --git a/dataext/structHash_test.go b/dataext/structHash_test.go
index 7d0f489..17bf94e 100644
--- a/dataext/structHash_test.go
+++ b/dataext/structHash_test.go
@@ -1,8 +1,8 @@
 package dataext
 
 import (
-	"encoding/hex"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
 	"testing"
 )
 
@@ -18,14 +18,14 @@ func noErrStructHash(t *testing.T, dat any, opt ...StructHashOptions) []byte {
 
 func TestStructHashSimple(t *testing.T) {
 
-	assertEqual(t, "209bf774af36cc3a045c152d9f1269ef3684ad819c1359ee73ff0283a308fefa", noErrStructHash(t, "Hello"))
-	assertEqual(t, "c32f3626b981ae2997db656f3acad3f1dc9d30ef6b6d14296c023e391b25f71a", noErrStructHash(t, 0))
-	assertEqual(t, "01b781b03e9586b257d387057dfc70d9f06051e7d3c1e709a57e13cc8daf3e35", noErrStructHash(t, []byte{}))
-	assertEqual(t, "93e1dcd45c732fe0079b0fb3204c7c803f0921835f6bfee2e6ff263e73eed53c", noErrStructHash(t, []int{}))
-	assertEqual(t, "54f637a376aad55b3160d98ebbcae8099b70d91b9400df23fb3709855d59800a", noErrStructHash(t, []int{1, 2, 3}))
-	assertEqual(t, "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", noErrStructHash(t, nil))
-	assertEqual(t, "349a7db91aa78fd30bbaa7c7f9c7bfb2fcfe72869b4861162a96713a852f60d3", noErrStructHash(t, []any{1, "", nil}))
-	assertEqual(t, "ca51aab87808bf0062a4a024de6aac0c2bad54275cc857a4944569f89fd245ad", noErrStructHash(t, struct{}{}))
+	tst.AssertHexEqual(t, "209bf774af36cc3a045c152d9f1269ef3684ad819c1359ee73ff0283a308fefa", noErrStructHash(t, "Hello"))
+	tst.AssertHexEqual(t, "c32f3626b981ae2997db656f3acad3f1dc9d30ef6b6d14296c023e391b25f71a", noErrStructHash(t, 0))
+	tst.AssertHexEqual(t, "01b781b03e9586b257d387057dfc70d9f06051e7d3c1e709a57e13cc8daf3e35", noErrStructHash(t, []byte{}))
+	tst.AssertHexEqual(t, "93e1dcd45c732fe0079b0fb3204c7c803f0921835f6bfee2e6ff263e73eed53c", noErrStructHash(t, []int{}))
+	tst.AssertHexEqual(t, "54f637a376aad55b3160d98ebbcae8099b70d91b9400df23fb3709855d59800a", noErrStructHash(t, []int{1, 2, 3}))
+	tst.AssertHexEqual(t, "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", noErrStructHash(t, nil))
+	tst.AssertHexEqual(t, "349a7db91aa78fd30bbaa7c7f9c7bfb2fcfe72869b4861162a96713a852f60d3", noErrStructHash(t, []any{1, "", nil}))
+	tst.AssertHexEqual(t, "ca51aab87808bf0062a4a024de6aac0c2bad54275cc857a4944569f89fd245ad", noErrStructHash(t, struct{}{}))
 
 }
 
@@ -37,13 +37,13 @@ func TestStructHashSimpleStruct(t *testing.T) {
 		F3 *int
 	}
 
-	assertEqual(t, "a90bff751c70c738bb5cfc9b108e783fa9c19c0bc9273458e0aaee6e74aa1b92", noErrStructHash(t, t0{
+	tst.AssertHexEqual(t, "a90bff751c70c738bb5cfc9b108e783fa9c19c0bc9273458e0aaee6e74aa1b92", noErrStructHash(t, t0{
 		F1: 10,
 		F2: []string{"1", "2", "3"},
 		F3: nil,
 	}))
 
-	assertEqual(t, "5d09090dc34ac59dd645f197a255f653387723de3afa1b614721ea5a081c675f", noErrStructHash(t, t0{
+	tst.AssertHexEqual(t, "5d09090dc34ac59dd645f197a255f653387723de3afa1b614721ea5a081c675f", noErrStructHash(t, t0{
 		F1: 10,
 		F2: []string{"1", "2", "3"},
 		F3: langext.Ptr(99),
@@ -64,7 +64,7 @@ func TestStructHashLayeredStruct(t *testing.T) {
 		SV3 t1_1
 	}
 
-	assertEqual(t, "fd4ca071fb40a288fee4b7a3dfdaab577b30cb8f80f81ec511e7afd72dc3b469", noErrStructHash(t, t1_2{
+	tst.AssertHexEqual(t, "fd4ca071fb40a288fee4b7a3dfdaab577b30cb8f80f81ec511e7afd72dc3b469", noErrStructHash(t, t1_2{
 		SV1: nil,
 		SV2: nil,
 		SV3: t1_1{
@@ -73,7 +73,7 @@ func TestStructHashLayeredStruct(t *testing.T) {
 			F15: false,
 		},
 	}))
-	assertEqual(t, "3fbf7c67d8121deda075cc86319a4e32d71744feb2cebf89b43bc682f072a029", noErrStructHash(t, t1_2{
+	tst.AssertHexEqual(t, "3fbf7c67d8121deda075cc86319a4e32d71744feb2cebf89b43bc682f072a029", noErrStructHash(t, t1_2{
 		SV1: nil,
 		SV2: &t1_1{},
 		SV3: t1_1{
@@ -82,7 +82,7 @@ func TestStructHashLayeredStruct(t *testing.T) {
 			F15: true,
 		},
 	}))
-	assertEqual(t, "b1791ccd1b346c3ede5bbffda85555adcd8216b93ffca23f14fe175ec47c5104", noErrStructHash(t, t1_2{
+	tst.AssertHexEqual(t, "b1791ccd1b346c3ede5bbffda85555adcd8216b93ffca23f14fe175ec47c5104", noErrStructHash(t, t1_2{
 		SV1: &t1_1{},
 		SV2: &t1_1{},
 		SV3: t1_1{
@@ -101,7 +101,7 @@ func TestStructHashMap(t *testing.T) {
 		F2 map[string]int
 	}
 
-	assertEqual(t, "d50c53ad1fafb448c33fddd5aca01a86a2edf669ce2ecab07ba6fe877951d824", noErrStructHash(t, t0{
+	tst.AssertHexEqual(t, "d50c53ad1fafb448c33fddd5aca01a86a2edf669ce2ecab07ba6fe877951d824", noErrStructHash(t, t0{
 		F1: 10,
 		F2: map[string]int{
 			"x": 1,
@@ -110,7 +110,7 @@ func TestStructHashMap(t *testing.T) {
 		},
 	}))
 
-	assertEqual(t, "d50c53ad1fafb448c33fddd5aca01a86a2edf669ce2ecab07ba6fe877951d824", noErrStructHash(t, t0{
+	tst.AssertHexEqual(t, "d50c53ad1fafb448c33fddd5aca01a86a2edf669ce2ecab07ba6fe877951d824", noErrStructHash(t, t0{
 		F1: 10,
 		F2: map[string]int{
 			"a": 99,
@@ -128,16 +128,9 @@ func TestStructHashMap(t *testing.T) {
 	m3["x"] = 1
 	m3["a"] = 2
 
-	assertEqual(t, "d50c53ad1fafb448c33fddd5aca01a86a2edf669ce2ecab07ba6fe877951d824", noErrStructHash(t, t0{
+	tst.AssertHexEqual(t, "d50c53ad1fafb448c33fddd5aca01a86a2edf669ce2ecab07ba6fe877951d824", noErrStructHash(t, t0{
 		F1: 10,
 		F2: m3,
 	}))
 
 }
-
-func assertEqual(t *testing.T, expected string, actual []byte) {
-	actualStr := hex.EncodeToString(actual)
-	if actualStr != expected {
-		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actualStr, expected)
-	}
-}
diff --git a/langext/base58_test.go b/langext/base58_test.go
index 2f5319b..11b1b86 100644
--- a/langext/base58_test.go
+++ b/langext/base58_test.go
@@ -21,46 +21,46 @@ func _decStr(t *testing.T, enc *B58Encoding, v string) string {
 }
 
 func TestBase58DefaultEncoding(t *testing.T) {
-	assertEqual(t, _encStr(t, Base58DefaultEncoding, "Hello"), "9Ajdvzr")
-	assertEqual(t, _encStr(t, Base58DefaultEncoding, "If debugging is the process of removing software bugs, then programming must be the process of putting them in."), "48638SMcJuah5okqPx4kCVf5d8QAdgbdNf28g7ReY13prUENNbMyssjq5GjsrJHF5zeZfqs4uJMUJHr7VbrU4XBUZ2Fw9DVtqtn9N1eXucEWSEZahXV6w4ysGSWqGdpeYTJf1MdDzTg8vfcQViifJjZX")
+	tst.AssertEqual(t, _encStr(t, Base58DefaultEncoding, "Hello"), "9Ajdvzr")
+	tst.AssertEqual(t, _encStr(t, Base58DefaultEncoding, "If debugging is the process of removing software bugs, then programming must be the process of putting them in."), "48638SMcJuah5okqPx4kCVf5d8QAdgbdNf28g7ReY13prUENNbMyssjq5GjsrJHF5zeZfqs4uJMUJHr7VbrU4XBUZ2Fw9DVtqtn9N1eXucEWSEZahXV6w4ysGSWqGdpeYTJf1MdDzTg8vfcQViifJjZX")
 }
 
 func TestBase58DefaultDecoding(t *testing.T) {
-	assertEqual(t, _decStr(t, Base58DefaultEncoding, "9Ajdvzr"), "Hello")
-	assertEqual(t, _decStr(t, Base58DefaultEncoding, "48638SMcJuah5okqPx4kCVf5d8QAdgbdNf28g7ReY13prUENNbMyssjq5GjsrJHF5zeZfqs4uJMUJHr7VbrU4XBUZ2Fw9DVtqtn9N1eXucEWSEZahXV6w4ysGSWqGdpeYTJf1MdDzTg8vfcQViifJjZX"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
+	tst.AssertEqual(t, _decStr(t, Base58DefaultEncoding, "9Ajdvzr"), "Hello")
+	tst.AssertEqual(t, _decStr(t, Base58DefaultEncoding, "48638SMcJuah5okqPx4kCVf5d8QAdgbdNf28g7ReY13prUENNbMyssjq5GjsrJHF5zeZfqs4uJMUJHr7VbrU4XBUZ2Fw9DVtqtn9N1eXucEWSEZahXV6w4ysGSWqGdpeYTJf1MdDzTg8vfcQViifJjZX"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
 }
 
 func TestBase58RippleEncoding(t *testing.T) {
-	assertEqual(t, _encStr(t, Base58RippleEncoding, "Hello"), "9wjdvzi")
-	assertEqual(t, _encStr(t, Base58RippleEncoding, "If debugging is the process of removing software bugs, then programming must be the process of putting them in."), "h3as3SMcJu26nokqPxhkUVCnd3Qwdgbd4Cp3gfReYrsFi7N44bMy11jqnGj1iJHEnzeZCq1huJM7JHifVbi7hXB7ZpEA9DVtqt894reXucNWSNZ26XVaAhy1GSWqGdFeYTJCrMdDzTg3vCcQV55CJjZX")
+	tst.AssertEqual(t, _encStr(t, Base58RippleEncoding, "Hello"), "9wjdvzi")
+	tst.AssertEqual(t, _encStr(t, Base58RippleEncoding, "If debugging is the process of removing software bugs, then programming must be the process of putting them in."), "h3as3SMcJu26nokqPxhkUVCnd3Qwdgbd4Cp3gfReYrsFi7N44bMy11jqnGj1iJHEnzeZCq1huJM7JHifVbi7hXB7ZpEA9DVtqt894reXucNWSNZ26XVaAhy1GSWqGdFeYTJCrMdDzTg3vCcQV55CJjZX")
 }
 
 func TestBase58RippleDecoding(t *testing.T) {
-	assertEqual(t, _decStr(t, Base58RippleEncoding, "9wjdvzi"), "Hello")
-	assertEqual(t, _decStr(t, Base58RippleEncoding, "h3as3SMcJu26nokqPxhkUVCnd3Qwdgbd4Cp3gfReYrsFi7N44bMy11jqnGj1iJHEnzeZCq1huJM7JHifVbi7hXB7ZpEA9DVtqt894reXucNWSNZ26XVaAhy1GSWqGdFeYTJCrMdDzTg3vCcQV55CJjZX"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
+	tst.AssertEqual(t, _decStr(t, Base58RippleEncoding, "9wjdvzi"), "Hello")
+	tst.AssertEqual(t, _decStr(t, Base58RippleEncoding, "h3as3SMcJu26nokqPxhkUVCnd3Qwdgbd4Cp3gfReYrsFi7N44bMy11jqnGj1iJHEnzeZCq1huJM7JHifVbi7hXB7ZpEA9DVtqt894reXucNWSNZ26XVaAhy1GSWqGdFeYTJCrMdDzTg3vCcQV55CJjZX"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
 }
 
 func TestBase58BitcoinEncoding(t *testing.T) {
-	assertEqual(t, _encStr(t, Base58BitcoinEncoding, "Hello"), "9Ajdvzr")
-	assertEqual(t, _encStr(t, Base58BitcoinEncoding, "If debugging is the process of removing software bugs, then programming must be the process of putting them in."), "48638SMcJuah5okqPx4kCVf5d8QAdgbdNf28g7ReY13prUENNbMyssjq5GjsrJHF5zeZfqs4uJMUJHr7VbrU4XBUZ2Fw9DVtqtn9N1eXucEWSEZahXV6w4ysGSWqGdpeYTJf1MdDzTg8vfcQViifJjZX")
+	tst.AssertEqual(t, _encStr(t, Base58BitcoinEncoding, "Hello"), "9Ajdvzr")
+	tst.AssertEqual(t, _encStr(t, Base58BitcoinEncoding, "If debugging is the process of removing software bugs, then programming must be the process of putting them in."), "48638SMcJuah5okqPx4kCVf5d8QAdgbdNf28g7ReY13prUENNbMyssjq5GjsrJHF5zeZfqs4uJMUJHr7VbrU4XBUZ2Fw9DVtqtn9N1eXucEWSEZahXV6w4ysGSWqGdpeYTJf1MdDzTg8vfcQViifJjZX")
 }
 
 func TestBase58BitcoinDecoding(t *testing.T) {
-	assertEqual(t, _decStr(t, Base58BitcoinEncoding, "9Ajdvzr"), "Hello")
-	assertEqual(t, _decStr(t, Base58BitcoinEncoding, "48638SMcJuah5okqPx4kCVf5d8QAdgbdNf28g7ReY13prUENNbMyssjq5GjsrJHF5zeZfqs4uJMUJHr7VbrU4XBUZ2Fw9DVtqtn9N1eXucEWSEZahXV6w4ysGSWqGdpeYTJf1MdDzTg8vfcQViifJjZX"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
+	tst.AssertEqual(t, _decStr(t, Base58BitcoinEncoding, "9Ajdvzr"), "Hello")
+	tst.AssertEqual(t, _decStr(t, Base58BitcoinEncoding, "48638SMcJuah5okqPx4kCVf5d8QAdgbdNf28g7ReY13prUENNbMyssjq5GjsrJHF5zeZfqs4uJMUJHr7VbrU4XBUZ2Fw9DVtqtn9N1eXucEWSEZahXV6w4ysGSWqGdpeYTJf1MdDzTg8vfcQViifJjZX"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
 }
 
 func TestBase58FlickrEncoding(t *testing.T) {
-	assertEqual(t, _encStr(t, Base58FlickrEncoding, "Hello"), "9aJCVZR")
-	assertEqual(t, _encStr(t, Base58FlickrEncoding, "If debugging is the process of removing software bugs, then programming must be the process of putting them in."), "48638rmBiUzG5NKQoX4KcuE5C8paCFACnE28F7qDx13PRtennAmYSSJQ5gJSRihf5ZDyEQS4UimtihR7uARt4wbty2fW9duTQTM9n1DwUBevreyzGwu6W4YSgrvQgCPDxsiE1mCdZsF8VEBpuHHEiJyw")
+	tst.AssertEqual(t, _encStr(t, Base58FlickrEncoding, "Hello"), "9aJCVZR")
+	tst.AssertEqual(t, _encStr(t, Base58FlickrEncoding, "If debugging is the process of removing software bugs, then programming must be the process of putting them in."), "48638rmBiUzG5NKQoX4KcuE5C8paCFACnE28F7qDx13PRtennAmYSSJQ5gJSRihf5ZDyEQS4UimtihR7uARt4wbty2fW9duTQTM9n1DwUBevreyzGwu6W4YSgrvQgCPDxsiE1mCdZsF8VEBpuHHEiJyw")
 }
 
 func TestBase58FlickrDecoding(t *testing.T) {
-	assertEqual(t, _decStr(t, Base58FlickrEncoding, "9aJCVZR"), "Hello")
-	assertEqual(t, _decStr(t, Base58FlickrEncoding, "48638rmBiUzG5NKQoX4KcuE5C8paCFACnE28F7qDx13PRtennAmYSSJQ5gJSRihf5ZDyEQS4UimtihR7uARt4wbty2fW9duTQTM9n1DwUBevreyzGwu6W4YSgrvQgCPDxsiE1mCdZsF8VEBpuHHEiJyw"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
+	tst.AssertEqual(t, _decStr(t, Base58FlickrEncoding, "9aJCVZR"), "Hello")
+	tst.AssertEqual(t, _decStr(t, Base58FlickrEncoding, "48638rmBiUzG5NKQoX4KcuE5C8paCFACnE28F7qDx13PRtennAmYSSJQ5gJSRihf5ZDyEQS4UimtihR7uARt4wbty2fW9duTQTM9n1DwUBevreyzGwu6W4YSgrvQgCPDxsiE1mCdZsF8VEBpuHHEiJyw"), "If debugging is the process of removing software bugs, then programming must be the process of putting them in.")
 }
 
-func assertEqual(t *testing.T, actual string, expected string) {
+func tst.AssertEqual(t *testing.T, actual string, expected string) {
 	if actual != expected {
 		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actual, expected)
 	}
diff --git a/rext/wrapper.go b/rext/wrapper.go
index f17e6ee..2c17601 100644
--- a/rext/wrapper.go
+++ b/rext/wrapper.go
@@ -117,7 +117,7 @@ func (m RegexMatch) GroupByName(name string) RegexMatchGroup {
 // GroupByName returns the value of a matched group (returns empty OptRegexMatchGroup if not found)
 func (m RegexMatch) GroupByNameOrEmpty(name string) OptRegexMatchGroup {
 	for idx, subname := range m.subnames {
-		if subname == name {
+		if subname == name && (m.submatchesIndex[idx*2] != -1 || m.submatchesIndex[idx*2+1] != -1) {
 			return OptRegexMatchGroup{&RegexMatchGroup{haystack: m.haystack, start: m.submatchesIndex[idx*2], end: m.submatchesIndex[idx*2+1]}}
 		}
 	}
diff --git a/rext/wrapper_test.go b/rext/wrapper_test.go
new file mode 100644
index 0000000..71bbc75
--- /dev/null
+++ b/rext/wrapper_test.go
@@ -0,0 +1,47 @@
+package rext
+
+import (
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"regexp"
+	"testing"
+)
+
+func TestGroupByNameOrEmpty1(t *testing.T) {
+
+	regex1 := W(regexp.MustCompile("0(?P<group1>A+)B(?P<group2>C+)0"))
+
+	match1, ok1 := regex1.MatchFirst("Hello 0AAAABCCC0 Bye.")
+
+	tst.AssertTrue(t, ok1)
+
+	tst.AssertFalse(t, match1.GroupByNameOrEmpty("group1").IsEmpty())
+	tst.AssertEqual(t, match1.GroupByNameOrEmpty("group1").ValueOrEmpty(), "AAAA")
+	tst.AssertEqual(t, *match1.GroupByNameOrEmpty("group1").ValueOrNil(), "AAAA")
+
+	tst.AssertFalse(t, match1.GroupByNameOrEmpty("group2").IsEmpty())
+	tst.AssertEqual(t, match1.GroupByNameOrEmpty("group2").ValueOrEmpty(), "CCC")
+	tst.AssertEqual(t, *match1.GroupByNameOrEmpty("group2").ValueOrNil(), "CCC")
+
+}
+
+func TestGroupByNameOrEmpty2(t *testing.T) {
+
+	regex1 := W(regexp.MustCompile("0(?P<group1>A+)B(?P<group2>C+)(?P<group3>C+)?0"))
+
+	match1, ok1 := regex1.MatchFirst("Hello 0AAAABCCC0 Bye.")
+
+	tst.AssertTrue(t, ok1)
+
+	tst.AssertFalse(t, match1.GroupByNameOrEmpty("group1").IsEmpty())
+	tst.AssertEqual(t, match1.GroupByNameOrEmpty("group1").ValueOrEmpty(), "AAAA")
+	tst.AssertEqual(t, *match1.GroupByNameOrEmpty("group1").ValueOrNil(), "AAAA")
+
+	tst.AssertFalse(t, match1.GroupByNameOrEmpty("group2").IsEmpty())
+	tst.AssertEqual(t, match1.GroupByNameOrEmpty("group2").ValueOrEmpty(), "CCC")
+	tst.AssertEqual(t, *match1.GroupByNameOrEmpty("group2").ValueOrNil(), "CCC")
+
+	tst.AssertTrue(t, match1.GroupByNameOrEmpty("group3").IsEmpty())
+	tst.AssertEqual(t, match1.GroupByNameOrEmpty("group3").ValueOrEmpty(), "")
+	tst.AssertPtrEqual(t, match1.GroupByNameOrEmpty("group3").ValueOrNil(), nil)
+
+}
diff --git a/rfctime/interface_test.go b/rfctime/interface_test.go
index 5fa79ce..b89d588 100644
--- a/rfctime/interface_test.go
+++ b/rfctime/interface_test.go
@@ -10,22 +10,22 @@ func TestAnyTimeInterface(t *testing.T) {
 	var v AnyTime
 
 	v = NowRFC3339Nano()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = NowRFC3339()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = NowUnix()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = NowUnixMilli()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = NowUnixNano()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = time.Now()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 }
 
@@ -33,18 +33,18 @@ func TestRFCTimeInterface(t *testing.T) {
 	var v RFCTime
 
 	v = NowRFC3339Nano()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = NowRFC3339()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = NowUnix()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = NowUnixMilli()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 	v = NowUnixNano()
-	assertEqual(t, v.String(), v.String())
+	tst.AssertEqual(t, v.String(), v.String())
 
 }
diff --git a/rfctime/rfc3339Nano_test.go b/rfctime/rfc3339Nano_test.go
index 4757366..19cd474 100644
--- a/rfctime/rfc3339Nano_test.go
+++ b/rfctime/rfc3339Nano_test.go
@@ -2,6 +2,7 @@ package rfctime
 
 import (
 	"encoding/json"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
 	"testing"
 	"time"
 )
@@ -37,16 +38,10 @@ func TestRoundtrip(t *testing.T) {
 		panic(err)
 	}
 
-	assertEqual(t, string(jstr1), string(jstr2))
+	tst.AssertEqual(t, string(jstr1), string(jstr2))
 
 	if !w1.Value.Equal(&w2.Value) {
 		t.Errorf("time differs")
 	}
 
 }
-
-func assertEqual(t *testing.T, actual string, expected string) {
-	if actual != expected {
-		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actual, expected)
-	}
-}
diff --git a/termext/termcolor_test.go b/termext/termcolor_test.go
index 35c0ad8..cf7d229 100644
--- a/termext/termcolor_test.go
+++ b/termext/termcolor_test.go
@@ -14,26 +14,26 @@ func TestSupportsColors(t *testing.T) {
 }
 
 func TestColor(t *testing.T) {
-	assertEqual(t, Red("test"), "\033[31mtest\u001B[0m")
-	assertEqual(t, Green("test"), "\033[32mtest\u001B[0m")
-	assertEqual(t, Yellow("test"), "\033[33mtest\u001B[0m")
-	assertEqual(t, Blue("test"), "\033[34mtest\u001B[0m")
-	assertEqual(t, Purple("test"), "\033[35mtest\u001B[0m")
-	assertEqual(t, Cyan("test"), "\033[36mtest\u001B[0m")
-	assertEqual(t, Gray("test"), "\033[37mtest\u001B[0m")
-	assertEqual(t, White("test"), "\033[97mtest\u001B[0m")
+	tst.AssertEqual(t, Red("test"), "\033[31mtest\u001B[0m")
+	tst.AssertEqual(t, Green("test"), "\033[32mtest\u001B[0m")
+	tst.AssertEqual(t, Yellow("test"), "\033[33mtest\u001B[0m")
+	tst.AssertEqual(t, Blue("test"), "\033[34mtest\u001B[0m")
+	tst.AssertEqual(t, Purple("test"), "\033[35mtest\u001B[0m")
+	tst.AssertEqual(t, Cyan("test"), "\033[36mtest\u001B[0m")
+	tst.AssertEqual(t, Gray("test"), "\033[37mtest\u001B[0m")
+	tst.AssertEqual(t, White("test"), "\033[97mtest\u001B[0m")
 
-	assertEqual(t, CleanString(Red("test")), "test")
-	assertEqual(t, CleanString(Green("test")), "test")
-	assertEqual(t, CleanString(Yellow("test")), "test")
-	assertEqual(t, CleanString(Blue("test")), "test")
-	assertEqual(t, CleanString(Purple("test")), "test")
-	assertEqual(t, CleanString(Cyan("test")), "test")
-	assertEqual(t, CleanString(Gray("test")), "test")
-	assertEqual(t, CleanString(White("test")), "test")
+	tst.AssertEqual(t, CleanString(Red("test")), "test")
+	tst.AssertEqual(t, CleanString(Green("test")), "test")
+	tst.AssertEqual(t, CleanString(Yellow("test")), "test")
+	tst.AssertEqual(t, CleanString(Blue("test")), "test")
+	tst.AssertEqual(t, CleanString(Purple("test")), "test")
+	tst.AssertEqual(t, CleanString(Cyan("test")), "test")
+	tst.AssertEqual(t, CleanString(Gray("test")), "test")
+	tst.AssertEqual(t, CleanString(White("test")), "test")
 }
 
-func assertEqual(t *testing.T, actual string, expected string) {
+func tst.AssertEqual(t *testing.T, actual string, expected string) {
 	if actual != expected {
 		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actual, expected)
 	}
diff --git a/timeext/parser_test.go b/timeext/parser_test.go
index 96b300e..a8064e0 100644
--- a/timeext/parser_test.go
+++ b/timeext/parser_test.go
@@ -7,56 +7,56 @@ import (
 
 func TestParseDurationShortString(t *testing.T) {
 
-	assertPDSSEqual(t, FromSeconds(1), "1s")
-	assertPDSSEqual(t, FromSeconds(1), "1sec")
-	assertPDSSEqual(t, FromSeconds(1), "1second")
-	assertPDSSEqual(t, FromSeconds(1), "1seconds")
-	assertPDSSEqual(t, FromSeconds(100), "100second")
-	assertPDSSEqual(t, FromSeconds(100), "100seconds")
-	assertPDSSEqual(t, FromSeconds(1883639.77), "1883639.77second")
-	assertPDSSEqual(t, FromSeconds(1883639.77), "1883639.77seconds")
-	assertPDSSEqual(t, FromSeconds(50), "50s")
-	assertPDSSEqual(t, FromSeconds(50), "50sec")
-	assertPDSSEqual(t, FromSeconds(1), "1second")
-	assertPDSSEqual(t, FromSeconds(50), "50seconds")
+	tst.AssertPDSSEqual(t, FromSeconds(1), "1s")
+	tst.AssertPDSSEqual(t, FromSeconds(1), "1sec")
+	tst.AssertPDSSEqual(t, FromSeconds(1), "1second")
+	tst.AssertPDSSEqual(t, FromSeconds(1), "1seconds")
+	tst.AssertPDSSEqual(t, FromSeconds(100), "100second")
+	tst.AssertPDSSEqual(t, FromSeconds(100), "100seconds")
+	tst.AssertPDSSEqual(t, FromSeconds(1883639.77), "1883639.77second")
+	tst.AssertPDSSEqual(t, FromSeconds(1883639.77), "1883639.77seconds")
+	tst.AssertPDSSEqual(t, FromSeconds(50), "50s")
+	tst.AssertPDSSEqual(t, FromSeconds(50), "50sec")
+	tst.AssertPDSSEqual(t, FromSeconds(1), "1second")
+	tst.AssertPDSSEqual(t, FromSeconds(50), "50seconds")
 
-	assertPDSSEqual(t, FromMinutes(10), "10m")
-	assertPDSSEqual(t, FromMinutes(10), "10min")
-	assertPDSSEqual(t, FromMinutes(1), "1minute")
-	assertPDSSEqual(t, FromMinutes(10), "10minutes")
-	assertPDSSEqual(t, FromMinutes(10.5), "10.5minutes")
+	tst.AssertPDSSEqual(t, FromMinutes(10), "10m")
+	tst.AssertPDSSEqual(t, FromMinutes(10), "10min")
+	tst.AssertPDSSEqual(t, FromMinutes(1), "1minute")
+	tst.AssertPDSSEqual(t, FromMinutes(10), "10minutes")
+	tst.AssertPDSSEqual(t, FromMinutes(10.5), "10.5minutes")
 
-	assertPDSSEqual(t, FromMilliseconds(100), "100ms")
-	assertPDSSEqual(t, FromMilliseconds(100), "100milliseconds")
-	assertPDSSEqual(t, FromMilliseconds(100), "100millisecond")
+	tst.AssertPDSSEqual(t, FromMilliseconds(100), "100ms")
+	tst.AssertPDSSEqual(t, FromMilliseconds(100), "100milliseconds")
+	tst.AssertPDSSEqual(t, FromMilliseconds(100), "100millisecond")
 
-	assertPDSSEqual(t, FromNanoseconds(99235), "99235ns")
-	assertPDSSEqual(t, FromNanoseconds(99235), "99235nanoseconds")
-	assertPDSSEqual(t, FromNanoseconds(99235), "99235nanosecond")
+	tst.AssertPDSSEqual(t, FromNanoseconds(99235), "99235ns")
+	tst.AssertPDSSEqual(t, FromNanoseconds(99235), "99235nanoseconds")
+	tst.AssertPDSSEqual(t, FromNanoseconds(99235), "99235nanosecond")
 
-	assertPDSSEqual(t, FromMicroseconds(99235), "99235us")
-	assertPDSSEqual(t, FromMicroseconds(99235), "99235microseconds")
-	assertPDSSEqual(t, FromMicroseconds(99235), "99235microsecond")
+	tst.AssertPDSSEqual(t, FromMicroseconds(99235), "99235us")
+	tst.AssertPDSSEqual(t, FromMicroseconds(99235), "99235microseconds")
+	tst.AssertPDSSEqual(t, FromMicroseconds(99235), "99235microsecond")
 
-	assertPDSSEqual(t, FromHours(1), "1h")
-	assertPDSSEqual(t, FromHours(1), "1hour")
-	assertPDSSEqual(t, FromHours(2), "2hours")
+	tst.AssertPDSSEqual(t, FromHours(1), "1h")
+	tst.AssertPDSSEqual(t, FromHours(1), "1hour")
+	tst.AssertPDSSEqual(t, FromHours(2), "2hours")
 
-	assertPDSSEqual(t, FromDays(1), "1d")
-	assertPDSSEqual(t, FromDays(1), "1day")
-	assertPDSSEqual(t, FromDays(10), "10days")
-	assertPDSSEqual(t, FromDays(1), "1days")
-	assertPDSSEqual(t, FromDays(10), "10day")
+	tst.AssertPDSSEqual(t, FromDays(1), "1d")
+	tst.AssertPDSSEqual(t, FromDays(1), "1day")
+	tst.AssertPDSSEqual(t, FromDays(10), "10days")
+	tst.AssertPDSSEqual(t, FromDays(1), "1days")
+	tst.AssertPDSSEqual(t, FromDays(10), "10day")
 
-	assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d10m")
-	assertPDSSEqual(t, FromDays(1)+FromMinutes(10)+FromSeconds(200), "1d10m200sec")
-	assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d:10m")
-	assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d 10m")
-	assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d,10m")
-	assertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d, 10m")
-	assertPDSSEqual(t, FromDays(1)+FromSeconds(1000), "1d   1000seconds")
+	tst.AssertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d10m")
+	tst.AssertPDSSEqual(t, FromDays(1)+FromMinutes(10)+FromSeconds(200), "1d10m200sec")
+	tst.AssertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d:10m")
+	tst.AssertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d 10m")
+	tst.AssertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d,10m")
+	tst.AssertPDSSEqual(t, FromDays(1)+FromMinutes(10), "1d, 10m")
+	tst.AssertPDSSEqual(t, FromDays(1)+FromSeconds(1000), "1d   1000seconds")
 
-	assertPDSSEqual(t, FromDays(1), "86400s")
+	tst.AssertPDSSEqual(t, FromDays(1), "86400s")
 }
 
 func assertPDSSEqual(t *testing.T, expected time.Duration, fmt string) {
diff --git a/tst/assertions.go b/tst/assertions.go
new file mode 100644
index 0000000..ef814bb
--- /dev/null
+++ b/tst/assertions.go
@@ -0,0 +1,65 @@
+package tst
+
+import (
+	"encoding/hex"
+	"testing"
+)
+
+func AssertEqual[T comparable](t *testing.T, actual T, expected T) {
+	if actual != expected {
+		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actual, expected)
+	}
+}
+
+func AssertNotEqual[T comparable](t *testing.T, actual T, expected T) {
+	if actual == expected {
+		t.Errorf("values do not differ: Actual: '%v', Expected: '%v'", actual, expected)
+	}
+}
+
+func AssertDeRefEqual[T comparable](t *testing.T, actual *T, expected T) {
+	if actual == nil {
+		t.Errorf("values differ: Actual: NIL, Expected: '%v'", expected)
+	}
+	if *actual != expected {
+		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actual, expected)
+	}
+}
+
+func AssertPtrEqual[T comparable](t *testing.T, actual *T, expected *T) {
+	if actual == nil && expected == nil {
+		return
+	}
+	if actual != nil && expected != nil {
+		if *actual != *expected {
+			t.Errorf("values differ: Actual: '%v', Expected: '%v'", *actual, *expected)
+		} else {
+			return
+		}
+	}
+	if actual == nil && expected != nil {
+		t.Errorf("values differ: Actual: nil, Expected: not-nil")
+	}
+	if actual != nil && expected == nil {
+		t.Errorf("values differ: Actual: not-nil, Expected: nil")
+	}
+}
+
+func AssertHexEqual(t *testing.T, expected string, actual []byte) {
+	actualStr := hex.EncodeToString(actual)
+	if actualStr != expected {
+		t.Errorf("values differ: Actual: '%v', Expected: '%v'", actualStr, expected)
+	}
+}
+
+func AssertTrue(t *testing.T, value bool) {
+	if !value {
+		t.Error("value should be true")
+	}
+}
+
+func AssertFalse(t *testing.T, value bool) {
+	if value {
+		t.Error("value should be false")
+	}
+}
diff --git a/tst/identAssertions.go b/tst/identAssertions.go
new file mode 100644
index 0000000..d88573d
--- /dev/null
+++ b/tst/identAssertions.go
@@ -0,0 +1,48 @@
+package tst
+
+import (
+	"testing"
+)
+
+func AssertIdentEqual[T comparable](t *testing.T, ident string, actual T, expected T) {
+	if actual != expected {
+		t.Errorf("[%s] values differ: Actual: '%v', Expected: '%v'", ident, actual, expected)
+	}
+}
+
+func AssertIdentNotEqual[T comparable](t *testing.T, ident string, actual T, expected T) {
+	if actual == expected {
+		t.Errorf("[%s] values do not differ: Actual: '%v', Expected: '%v'", ident, actual, expected)
+	}
+}
+
+func AssertIdentPtrEqual[T comparable](t *testing.T, ident string, actual *T, expected *T) {
+	if actual == nil && expected == nil {
+		return
+	}
+	if actual != nil && expected != nil {
+		if *actual != *expected {
+			t.Errorf("[%s] values differ: Actual: '%v', Expected: '%v'", ident, *actual, *expected)
+		} else {
+			return
+		}
+	}
+	if actual == nil && expected != nil {
+		t.Errorf("[%s] values differ: Actual: nil, Expected: not-nil", ident)
+	}
+	if actual != nil && expected == nil {
+		t.Errorf("[%s] values differ: Actual: not-nil, Expected: nil", ident)
+	}
+}
+
+func AssertIdentTrue(t *testing.T, ident string, value bool) {
+	if !value {
+		t.Errorf("[%s] value should be true", ident)
+	}
+}
+
+func AssertIdentFalse(t *testing.T, ident string, value bool) {
+	if !value {
+		t.Errorf("[%s] value should be false", ident)
+	}
+}