diff --git a/.travis.sh b/.travis.sh
index ebf44703..38ea453d 100755
--- a/.travis.sh
+++ b/.travis.sh
@@ -70,4 +70,19 @@ postgresql_uninstall() {
 	sudo rm -rf /var/lib/postgresql
 }
 
+megacheck_install() {
+	# Megacheck is Go 1.6+, so skip if Go 1.5.
+	if [[ "$(go version)" =~ "go1.5" ]]
+	then
+		echo "megacheck not supported, skipping installation"
+		return 0
+	fi
+	# Lock megacheck version at $MEGACHECK_VERSION to prevent spontaneous
+	# new error messages in old code.
+	go get -d honnef.co/go/tools/...
+	git -C $GOPATH/src/honnef.co/go/tools/ checkout $MEGACHECK_VERSION
+	go install honnef.co/go/tools/cmd/megacheck
+	megacheck --version
+}
+
 $1
diff --git a/.travis.yml b/.travis.yml
index 452515c6..d9805c40 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,7 @@ env:
     - PQGOSSLTESTS=1
     - PQSSLCERTTEST_PATH=$PWD/certs
     - PGHOST=127.0.0.1
+    - MEGACHECK_VERSION=2017.1
   matrix:
     - PGVERSION=9.6
     - PGVERSION=9.5
@@ -31,6 +32,7 @@ before_install:
   - ./.travis.sh postgresql_install
   - ./.travis.sh postgresql_configure
   - ./.travis.sh client_configure
+  - ./.travis.sh megacheck_install
   - go get golang.org/x/tools/cmd/goimports
 
 before_script:
@@ -42,5 +44,13 @@ script:
   - >
     goimports -d -e $(find -name '*.go') | awk '{ print } END { exit NR == 0 ? 0 : 1 }'
   - go vet ./...
+    # For compatibility with Go 1.5, launch only if megacheck is present,
+    # ignore SA1019 (deprecation warnings) in conn_test.go (we have to use the
+    # deprecated driver.Execer and driver.Queryer interfaces) and S1024
+    # (time.Until) everywhere.
+  - >
+    which megacheck > /dev/null
+    && megacheck -ignore 'github.com/lib/pq/conn_test.go:SA1019 github.com/lib/pq/*.go:S1024' ./...
+    || echo 'megacheck is not supported, skipping check'
   - PQTEST_BINARY_PARAMETERS=no  go test -race -v ./...
   - PQTEST_BINARY_PARAMETERS=yes go test -race -v ./...
diff --git a/array_test.go b/array_test.go
index 10b84318..f724bcd8 100644
--- a/array_test.go
+++ b/array_test.go
@@ -89,9 +89,7 @@ func TestParseArrayError(t *testing.T) {
 }
 
 func TestArrayScanner(t *testing.T) {
-	var s sql.Scanner
-
-	s = Array(&[]bool{})
+	var s sql.Scanner = Array(&[]bool{})
 	if _, ok := s.(*BoolArray); !ok {
 		t.Errorf("Expected *BoolArray, got %T", s)
 	}
@@ -126,9 +124,7 @@ func TestArrayScanner(t *testing.T) {
 }
 
 func TestArrayValuer(t *testing.T) {
-	var v driver.Valuer
-
-	v = Array([]bool{})
+	var v driver.Valuer = Array([]bool{})
 	if _, ok := v.(*BoolArray); !ok {
 		t.Errorf("Expected *BoolArray, got %T", v)
 	}
@@ -1193,9 +1189,7 @@ func TestGenericArrayValue(t *testing.T) {
 }
 
 func TestGenericArrayValueErrors(t *testing.T) {
-	var v []interface{}
-
-	v = []interface{}{func() {}}
+	v := []interface{}{func() {}}
 	if _, err := (GenericArray{v}).Value(); err == nil {
 		t.Errorf("Expected error for %q, got nil", v)
 	}
diff --git a/conn.go b/conn.go
index 338a0bc1..6ac17041 100644
--- a/conn.go
+++ b/conn.go
@@ -149,11 +149,7 @@ func (cn *conn) handleDriverSettings(o values) (err error) {
 	if err != nil {
 		return err
 	}
-	err = boolSetting("binary_parameters", &cn.binaryParameters)
-	if err != nil {
-		return err
-	}
-	return nil
+	return boolSetting("binary_parameters", &cn.binaryParameters)
 }
 
 func (cn *conn) handlePgpass(o values) {
diff --git a/conn_test.go b/conn_test.go
index 092e7bd2..030a798c 100644
--- a/conn_test.go
+++ b/conn_test.go
@@ -1207,16 +1207,11 @@ func TestParseComplete(t *testing.T) {
 	tpc("SELECT foo", "", 0, true) // invalid row count
 }
 
-func TestExecerInterface(t *testing.T) {
-	// Gin up a straw man private struct just for the type check
-	cn := &conn{c: nil}
-	var cni interface{} = cn
-
-	_, ok := cni.(driver.Execer)
-	if !ok {
-		t.Fatal("Driver doesn't implement Execer")
-	}
-}
+// Test interface conformance.
+var (
+	_ driver.Execer  = (*conn)(nil)
+	_ driver.Queryer = (*conn)(nil)
+)
 
 func TestNullAfterNonNull(t *testing.T) {
 	db := openTestConn(t)
diff --git a/copy_test.go b/copy_test.go
index 86745b38..c1a3cd7f 100644
--- a/copy_test.go
+++ b/copy_test.go
@@ -9,8 +9,7 @@ import (
 )
 
 func TestCopyInStmt(t *testing.T) {
-	var stmt string
-	stmt = CopyIn("table name")
+	stmt := CopyIn("table name")
 	if stmt != `COPY "table name" () FROM STDIN` {
 		t.Fatal(stmt)
 	}
@@ -27,8 +26,7 @@ func TestCopyInStmt(t *testing.T) {
 }
 
 func TestCopyInSchemaStmt(t *testing.T) {
-	var stmt string
-	stmt = CopyInSchema("schema name", "table name")
+	stmt := CopyInSchema("schema name", "table name")
 	if stmt != `COPY "schema name"."table name" () FROM STDIN` {
 		t.Fatal(stmt)
 	}
@@ -226,7 +224,7 @@ func TestCopyInTypes(t *testing.T) {
 	if text != "Héllö\n ☃!\r\t\\" {
 		t.Fatal("unexpected result", text)
 	}
-	if bytes.Compare(blob, []byte{0, 255, 9, 10, 13}) != 0 {
+	if !bytes.Equal(blob, []byte{0, 255, 9, 10, 13}) {
 		t.Fatal("unexpected result", blob)
 	}
 	if nothing.Valid {
diff --git a/encode_test.go b/encode_test.go
index 837d45be..634a05c6 100644
--- a/encode_test.go
+++ b/encode_test.go
@@ -267,9 +267,7 @@ func TestTimestampWithOutTimezone(t *testing.T) {
 			t.Fatalf("Could not run query: %v", err)
 		}
 
-		n := r.Next()
-
-		if n != true {
+		if !r.Next() {
 			t.Fatal("Expected at least one row")
 		}
 
@@ -289,8 +287,7 @@ func TestTimestampWithOutTimezone(t *testing.T) {
 				expected, result)
 		}
 
-		n = r.Next()
-		if n != false {
+		if r.Next() {
 			t.Fatal("Expected only one row")
 		}
 	}
@@ -731,8 +728,7 @@ func TestAppendEscapedText(t *testing.T) {
 }
 
 func TestAppendEscapedTextExistingBuffer(t *testing.T) {
-	var buf []byte
-	buf = []byte("123\t")
+	buf := []byte("123\t")
 	if esc := appendEscapedText(buf, "hallo\tescape"); string(esc) != "123\thallo\\tescape" {
 		t.Fatal(string(esc))
 	}
diff --git a/notify.go b/notify.go
index 09f94244..a1716515 100644
--- a/notify.go
+++ b/notify.go
@@ -639,7 +639,7 @@ func (l *Listener) resync(cn *ListenerConn, notificationChan <-chan *Notificatio
 			// close and then return the error message from the connection, as
 			// per ListenerConn's interface.
 			if err != nil {
-				for _ = range notificationChan {
+				for range notificationChan {
 				}
 				doneChan <- cn.Err()
 				return