diff --git a/doc/index.rst b/doc/index.rst
index c617c52..54564f7 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -24,7 +24,7 @@ Notes
  * This implementation mimics the :class:`IOStream` implementation, and should
    be a drop-in replacement for :class:`IOStream`, with some caveats:
 
-   * :func:`seek_end` and :func:`truncate` are not available
+   * :func:`seekend` and :func:`truncate` are not available
    * :func:`readuntil` is available, but is not very efficient.
      (But :func:`readline` works fine.)
 
@@ -43,7 +43,7 @@ following :class:`IO`/:class:`IOStream` functions are supported:
  * :func:`write()`
  * :func:`peek()`
 
-Due to limitations in ``zlib``, :func:`seek_end` and :func:`truncate` are not available.
+Due to limitations in ``zlib``, :func:`seekend` and :func:`truncate` are not available.
 
 ---------
 Functions
diff --git a/src/GZip.jl b/src/GZip.jl
index e282f0b..51bbc91 100644
--- a/src/GZip.jl
+++ b/src/GZip.jl
@@ -5,7 +5,7 @@ module GZip
 using Compat
 
 import Base: show, fd, close, flush, truncate, seek,
-             skip, position, eof, read, readall,
+             seekend, skip, position, eof, read, readall,
              readline, write, peek
 
 export
@@ -140,7 +140,7 @@ macro test_gzerror(s, cc, val)
     quote
         if $(esc(s))._closed throw(EOFError()) end
         ret = $(esc(cc))
-        if ret == $(esc(val)) throw(ret, GZError($(esc(s)))) end
+        if ret == $(esc(val)) throw(GZError(ret, $(esc(s)))) end
         ret
     end
 end
@@ -318,7 +318,7 @@ flush(s::GZipStream, fl::Integer) =
     @test_z_ok ccall((:gzflush, _zlib), Int32, (Ptr{Void}, Int32), s.gz_file, @compat(Int32(fl)))
 flush(s::GZipStream) = flush(s, Z_SYNC_FLUSH)
 
-truncate(s::GZipStream, n::Integer) = error("truncate is not supported for GZipStreams")
+truncate(s::GZipStream, n::Integer) = throw(MethodError(truncate, (GZipStream, Integer)))
 
 # Note: seeks to byte position within uncompressed data stream
 seek(s::GZipStream, n::Integer) =
@@ -326,8 +326,6 @@ seek(s::GZipStream, n::Integer) =
            s.gz_file, n, SEEK_SET)!=-1 || # Mimick behavior of seek(s::IOStream, n)
     error("seek (gzseek) failed"))
 
-seek_end(s::GZipStream) = error("seek_end is not supported for GZipStreams")
-
 # Note: skips bytes within uncompressed data stream
 skip(s::GZipStream, n::Integer) =
     (ccall((_gzseek, _zlib), ZFileOffset, (Ptr{Void}, ZFileOffset, Int32),
diff --git a/src/zlib_h.jl b/src/zlib_h.jl
index 0dabd34..1e4e6c8 100644
--- a/src/zlib_h.jl
+++ b/src/zlib_h.jl
@@ -6,7 +6,7 @@
 # Constants
 
 zlib_version = bytestring(ccall((:zlibVersion, _zlib), Ptr{UInt8}, ()))
-ZLIB_VERSION = tuple([parseint(c) for c in split(zlib_version, '.')]...)
+ZLIB_VERSION = tuple([parse(Int, c) for c in split(zlib_version, '.')]...)
 
 # Flush values
 const Z_NO_FLUSH       = @compat Int32(0)
diff --git a/test/runtests.jl b/test/runtests.jl
index 392b28e..ad55026 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -10,9 +10,9 @@ using Base.Test
 
 tmp = mktempdir()
 
-test_infile = joinpath(JULIA_HOME, "..", "share", "doc", "julia", "helpdb.jl")
-test_compressed = "$tmp/julia.gz"
-test_empty = "$tmp/empty.jl.gz"
+test_infile = Pkg.dir("GZip", "test", "runtests.jl")
+test_compressed = joinpath(tmp, "runtests.jl.gz")
+test_empty = joinpath(tmp, "empty.jl.gz")
 
 @windows_only gunzip="gunzip.exe"
 @unix_only    gunzip="gunzip"
@@ -37,7 +37,6 @@ gzfile = gzopen(test_compressed, "wb")
 @test close(gzfile) == Z_OK
 @test close(gzfile) != Z_OK
 
-#@test throws_exception(write(gzfile, data), GZError)
 @test_throws EOFError write(gzfile, data)
 
 if test_gunzip
@@ -71,9 +70,10 @@ close(raw_file)
 
 try
     gzopen(readall, test_compressed)
-    throw(Error("Expecting an ArgumentError or similar"))
+    throw(Error("Expecting ArgumentError or similar"))
 catch e
-    @test isa(e, ArgumentError) || contains(e.msg, "too many arguments")
+    @test typeof(e) <: Union(ArgumentError, ZError, GZError) ||
+          contains(e.msg, "too many arguments")
 end
 
 
@@ -90,7 +90,7 @@ pos = position(gzfile)
 @test skip(gzfile, 100)
 @test position(gzfile) == pos + 100
 
-@test_throws ErrorException truncate(gzfile, 100)
+@test_throws MethodError truncate(gzfile, 100)
 @test_throws MethodError seekend(gzfile)
 
 @test close(gzfile) == Z_OK
@@ -192,8 +192,8 @@ let BUFSIZE = 65536
             end
 
             # Array file
-            b_array_fn = "$tmp/b_array.raw.gz"
-            r_array_fn = "$tmp/r_array.raw.gz"
+            b_array_fn = joinpath(tmp, "b_array.raw.gz")
+            r_array_fn = joinpath(tmp, "r_array.raw.gz")
 
             gzaf_b = gzopen(b_array_fn, "w$level")
             write(gzaf_b, b)