diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 9cc3afe..d346226 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: "1.17"
+          go-version: "1.18"
 
       - name: Lint
         run: make lint
diff --git a/Makefile b/Makefile
index e11de90..7f82e9c 100644
--- a/Makefile
+++ b/Makefile
@@ -22,4 +22,4 @@ bench/memory/%:
 	go test -bench=. -benchmem -memprofile="profilling/${*}-memory.p" "./${*}"
 
 lint:
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@v1.43.0 run ./...
+	go run github.com/golangci/golangci-lint/cmd/golangci-lint@v1.49.0 run ./...
diff --git a/assert/assert.go b/assert/assert.go
index 075554a..1b596bd 100644
--- a/assert/assert.go
+++ b/assert/assert.go
@@ -2,12 +2,13 @@ package assert
 
 import (
 	"fmt"
+	"strings"
 	"testing"
 )
 
 // Assert is a custom assert helper.
 type Assert struct {
-	t        *testing.T
+	t        testing.TB
 	details  []interface{}
 	failfunc FailureReport
 }
@@ -34,7 +35,7 @@ const detailSeparator = ": "
 //   ...
 // The code above fails with message below:
 //   wanted[test] but got[tesd].Name mismatch: comparing objects Value1 and Value2
-func New(t *testing.T, fail FailureReport, details ...interface{}) *Assert {
+func New(t testing.TB, fail FailureReport, details ...interface{}) *Assert {
 	return &Assert{
 		t:        t,
 		failfunc: fail,
@@ -79,10 +80,14 @@ func errordetails(details ...interface{}) string {
 }
 
 func errctx(context []interface{}, details ...interface{}) string {
-	errstr := errordetails(details...)
-	if len(errstr) > 0 {
-		errstr += detailSeparator
+	msgs := []string{}
+	detailsMsg := errordetails(details...)
+	if detailsMsg != "" {
+		msgs = append(msgs, detailsMsg)
 	}
-	errstr += errordetails(context...)
-	return errstr
+	ctxMsg := errordetails(context...)
+	if ctxMsg != "" {
+		msgs = append(msgs, ctxMsg)
+	}
+	return strings.Join(msgs, detailSeparator)
 }
diff --git a/assert/assert_test.go b/assert/assert_test.go
index 085717c..dda2ba1 100644
--- a/assert/assert_test.go
+++ b/assert/assert_test.go
@@ -354,3 +354,61 @@ func TestPartial(t *testing.T) {
 		})
 	}
 }
+
+func TestAssertErrMessages(t *testing.T) {
+	t.Run("error: no details", func(t *testing.T) {
+		a := assert.New(t, func(a *assert.Assert, got string) {
+			want := "expected error, got nil"
+			assert.EqualStrings(t, want, got)
+		})
+		a.Error(nil)
+	})
+
+	t.Run("error: constructor msg and details msg with fmt", func(t *testing.T) {
+		a := assert.New(t, func(a *assert.Assert, got string) {
+			want := "expected error, got nil: func fmt 777: constructor fmt 666"
+			assert.EqualStrings(t, want, got)
+		}, "constructor fmt %d", 666)
+		a.Error(nil, "func fmt %d", 777)
+	})
+
+	t.Run("error: constructor msg and details msg no fmt", func(t *testing.T) {
+		a := assert.New(t, func(a *assert.Assert, got string) {
+			want := "expected error, got nil: func msg: constructor msg"
+			assert.EqualStrings(t, want, got)
+		}, "constructor msg")
+		a.Error(nil, "func msg")
+	})
+
+	t.Run("error: constructor msg with fmt", func(t *testing.T) {
+		a := assert.New(t, func(a *assert.Assert, got string) {
+			want := "expected error, got nil: constructor fmt 666"
+			assert.EqualStrings(t, want, got)
+		}, "constructor fmt %d", 666)
+		a.Error(nil)
+	})
+
+	t.Run("error: constructor msg no fmt", func(t *testing.T) {
+		a := assert.New(t, func(a *assert.Assert, got string) {
+			want := "expected error, got nil: constructor msg"
+			assert.EqualStrings(t, want, got)
+		}, "constructor msg")
+		a.Error(nil)
+	})
+
+	t.Run("error: detail msg with fmt", func(t *testing.T) {
+		a := assert.New(t, func(a *assert.Assert, got string) {
+			want := "expected error, got nil: func fmt 666"
+			assert.EqualStrings(t, want, got)
+		})
+		a.Error(nil, "func fmt %d", 666)
+	})
+
+	t.Run("error: detail msg no fmt", func(t *testing.T) {
+		a := assert.New(t, func(a *assert.Assert, got string) {
+			want := "expected error, got nil: func msg"
+			assert.EqualStrings(t, want, got)
+		})
+		a.Error(nil, "func msg")
+	})
+}
diff --git a/assert/equal.go b/assert/equal.go
index bcdfa78..a1019ff 100644
--- a/assert/equal.go
+++ b/assert/equal.go
@@ -31,7 +31,7 @@ func (assert *Assert) IsFalse(b bool, details ...interface{}) {
 
 // IsTrue asserts that b is true.
 // If it's not then Fatal() is called with details.
-func IsTrue(t *testing.T, cond bool, details ...interface{}) {
+func IsTrue(t testing.TB, cond bool, details ...interface{}) {
 	assert := New(t, Fatal)
 	assert.IsTrue(cond, details...)
 }
@@ -47,7 +47,7 @@ func (assert *Assert) EqualStrings(want string, got string, details ...interface
 
 // EqualStrings compares the two strings for equality.
 // If they are not equal then the Fatal() function is called with details.
-func EqualStrings(t *testing.T, want string, got string, details ...interface{}) {
+func EqualStrings(t testing.TB, want string, got string, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal)
 	assert.EqualStrings(want, got, details...)
@@ -64,7 +64,7 @@ func (assert *Assert) EqualInts(want int, got int, details ...interface{}) {
 
 // EqualInts compares the two ints for equality.
 // If they are not equal then the Fatal() function is called with details.
-func EqualInts(t *testing.T, want int, got int, details ...interface{}) {
+func EqualInts(t testing.TB, want int, got int, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal)
 	assert.EqualInts(want, got, details...)
@@ -90,7 +90,7 @@ func (assert *Assert) EqualFloats(want float64, got float64, details ...interfac
 
 // EqualFloats compares the two floats for equality.
 // If they are not equal then the Fatal() function is called with details.
-func EqualFloats(t *testing.T, want, got float64, details ...interface{}) {
+func EqualFloats(t testing.TB, want, got float64, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal)
 	assert.EqualFloats(want, got)
@@ -107,7 +107,7 @@ func (assert *Assert) EqualComplexes(want, got complex128, details ...interface{
 
 // EqualComplexes compares the two complex numbers for equality.
 // If they are not equal then the Fatal function is called with details.
-func EqualComplexes(t *testing.T, want, got complex128, details ...interface{}) {
+func EqualComplexes(t testing.TB, want, got complex128, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal)
 	assert.EqualComplexes(want, got, details...)
@@ -138,7 +138,7 @@ func (assert *Assert) EqualErrs(want error, got error, details ...interface{}) {
 // EqualErrs compares if two errors have the same error description (by calling .Error()).
 // If they are not equal then the Fatal() function is called with details.
 // Both errors can't be nil.
-func EqualErrs(t *testing.T, want, got error, details ...interface{}) {
+func EqualErrs(t testing.TB, want, got error, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal)
 	assert.EqualErrs(want, got, details...)
diff --git a/assert/error.go b/assert/error.go
index b461581..f2ae891 100644
--- a/assert/error.go
+++ b/assert/error.go
@@ -16,7 +16,7 @@ func (assert *Assert) NoError(err error, details ...interface{}) {
 
 // NoError will assert that given error is nil.
 // If it's nil then the Fatal() function is called with details.
-func NoError(t *testing.T, err error, details ...interface{}) {
+func NoError(t testing.TB, err error, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal)
 	assert.NoError(err, details...)
@@ -31,7 +31,7 @@ func (assert *Assert) Error(err error, details ...interface{}) {
 }
 
 // Error will call Fatal with the given details if the error is nil.
-func Error(t *testing.T, err error, details ...interface{}) {
+func Error(t testing.TB, err error, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal)
 	assert.Error(err, details...)
@@ -50,7 +50,7 @@ func (assert *Assert) IsError(got, want error, details ...interface{}) {
 // IsError will assert if the given error matches the want error.
 // It uses the errors.Is() function to check if the error wraps the wanted error.
 // It calls the Fatal() function if errors.Is() returns false.
-func IsError(t *testing.T, got, want error, details ...interface{}) {
+func IsError(t testing.TB, got, want error, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal)
 	assert.IsError(got, want, details...)
diff --git a/assert/partial.go b/assert/partial.go
index 86bea67..c886f74 100644
--- a/assert/partial.go
+++ b/assert/partial.go
@@ -141,7 +141,7 @@ func (assert *Assert) partialStruct(obj interface{}, target interface{}, details
 	}
 }
 
-func Partial(t *testing.T, obj interface{}, target interface{}, details ...interface{}) {
+func Partial(t testing.TB, obj interface{}, target interface{}, details ...interface{}) {
 	t.Helper()
 	assert := New(t, Fatal, details...)
 	assert.Partial(obj, target)
diff --git a/assert/string.go b/assert/string.go
index cae0f6b..6c7d119 100644
--- a/assert/string.go
+++ b/assert/string.go
@@ -24,14 +24,14 @@ func (assert *Assert) StringMatch(pattern string, str string, details ...interfa
 
 // StringContains asserts that string s contains the subst string and calls
 // the Fatal() function with details otherwise.
-func StringContains(t *testing.T, s, substr string, details ...interface{}) {
+func StringContains(t testing.TB, s, substr string, details ...interface{}) {
 	assert := New(t, Fatal)
 	assert.StringContains(s, substr, details...)
 }
 
 // StringMatch asserts that string matches the regex pattern and calls
 // the Fatal() function with details otherwise.
-func StringMatch(t *testing.T, pattern string, str string, details ...interface{}) {
+func StringMatch(t testing.TB, pattern string, str string, details ...interface{}) {
 	assert := New(t, Fatal)
 	assert.StringMatch(pattern, str, details...)
 }