diff --git a/test/Makefile.am b/test/Makefile.am
index 52a3fa4b..8992ef04 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -34,6 +34,7 @@ TESTS_ENVIRONMENT = \
 	MEMCHECK="$(MEMCHECK)"
 
 EXTRA_DIST = \
+	$(REFFILES) \
 	$(TESTSCRIPTS) \
 	$(IMAGES_EXTRA_DIST) \
 	CMakeLists.txt \
@@ -144,6 +145,14 @@ TESTSCRIPTS = \
 	tiff2rgba-rgb-3c-8b.sh \
 	$(JPEG_DEPENDENT_TESTSCRIPTS)
 
+# This list should contain the references files
+# from the 'refs' subdirectory
+REFFILES = \
+	refs/o-tiff2ps-EPS1.ps \
+	refs/o-tiff2ps-PS1.ps \
+	refs/o-tiff2ps-PS2.ps \
+	refs/o-tiff2ps-PS3.ps
+
 # This list should contain all of the TIFF files in the 'images'
 # subdirectory which are intended to be used as input images for
 # tests.  All of these files should use the extension ".tiff".
diff --git a/test/common.sh b/test/common.sh
index 42c38737..5bebcd37 100644
--- a/test/common.sh
+++ b/test/common.sh
@@ -7,6 +7,7 @@ SRCDIR=`cd $SRCDIR && pwd`
 TOPSRCDIR=`cd $srcdir/.. && pwd`
 TOOLS=`cd ../tools && pwd`
 IMAGES="${SRCDIR}/images"
+REFS="${SRCDIR}/refs"
 
 # Aliases for built tools
 FAX2PS=${TOOLS}/fax2ps
diff --git a/test/refs/o-tiff2ps-EPS1.ps b/test/refs/o-tiff2ps-EPS1.ps
new file mode 100644
index 00000000..9d9da8a2
--- /dev/null
+++ b/test/refs/o-tiff2ps-EPS1.ps
@@ -0,0 +1,112 @@
+%!PS-Adobe-3.0 EPSF-3.0
+%%Creator: tiff2ps
+%%Title: miniswhite-1c-1b.tiff
+%%CreationDate: Tue Apr  2 16:33:00 2019
+%%DocumentData: Clean7Bit
+%%Origin: 0 0
+%%BoundingBox: 0 0 157 151
+%%LanguageLevel: 1
+%%Pages: 1 1
+%%EndComments
+%%Page: 1 1
+gsave
+100 dict begin
+157.000000 151.000000 scale
+%ImageData: 157 151 1 1 0 1 2 "image"
+/scanLine 20 string def
+157 151 1
+[157 0 0 -151 0 151]
+{currentfile scanLine readhexstring pop} bind
+image
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+showpage
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diff --git a/test/refs/o-tiff2ps-PS1.ps b/test/refs/o-tiff2ps-PS1.ps
new file mode 100644
index 00000000..62c3e4bb
--- /dev/null
+++ b/test/refs/o-tiff2ps-PS1.ps
@@ -0,0 +1,115 @@
+%!PS-Adobe-3.0
+%%Creator: tiff2ps
+%%Title: miniswhite-1c-1b.tiff
+%%CreationDate: Tue Apr  2 16:33:00 2019
+%%DocumentData: Clean7Bit
+%%Origin: 0 0
+%%BoundingBox: 0 0 157 151
+%%LanguageLevel: 1
+%%Pages: (atend)
+%%EndComments
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diff --git a/test/refs/o-tiff2ps-PS2.ps b/test/refs/o-tiff2ps-PS2.ps
new file mode 100644
index 00000000..e7fe4339
--- /dev/null
+++ b/test/refs/o-tiff2ps-PS2.ps
@@ -0,0 +1,104 @@
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+!!0lcJ:GL&!!!!(E$'O9e_DhR!!.U8`kT:i5QCcn^`3%DJ+t\h!!*'"PR#!SJ,fQNi#hFb<R;9Q
+!!!A!\YnNj(]XOHGRseVs)9XiJ,gSiM?gpAKE(u_TF\g7TC>)=J,hP/L9J^T!!!!'n-/](q-\.>
+8,tP5iP32SKE(uVYRgWgs.KDkfEaS>iSWjg+92BHm^rJoBu#5uiZJ>rs8UZ75QCch]l!E?rrN0"
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+J,fQLs8W,s:]LJ#qs4/Ceq3)b!!!!Qs8W,s!WW32s&O@`r@d@6!!!!)hp;?$5X5;Senb$kqHmn8
+!!!!)S,`Nd,ldoMs8Gh*hu!HR!!!!1LHkh<"98E4s5*M]hfo,#!!!!Y,ldoB+92BPrNg_Z^$l"$
+!!!!IVZ6\o#ljr9n+UQ%rkJ%(!!!!Y%0-A&!!!!0rP$>XiJ6>5+92C\PQ1[X&-)\@s8E-'ecWuh
+!!!"D\,ZL+!<<*As8IQOmNJ5FO8o:U0E;(I+92BPs87NPli:E(J,fRos8W,o!!!!0s6p*kh1,J1
+a8c4uhuE`G6i[2ts2"a:^&S-8huE`oYQ+Xl!!!!@rV?QqRt(JDkl:]C?iU0$+92B`OF+hES=fi^
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+s8W,/s8W,g!!!#m+?4HC!'S[/s8W,os8W,o!!!#iU^n%;!-S>Bs8W,gs8W,g!!!#k!!e&TE:#mj
+s8W,Os8W,g!!!#g&-LPb!rAPis8Vuks8W,WJ,fSb8LOQ=LA1`Ls8W,gs8W,W!!!,;U:?:L,(KXn
+s8V!Gs8W,g!!!,Z!^[5(e,TIKs8W(ks8W,W!!!,ZBG(:UTE#N's8W,7s8W,g!!!8D!CWR_<'UEa
+s8VgYs8W,G!!!,<WB`uSTE"rls8REGs8W,W!!!8"+rUF^ec5[Ms8W*!s8W,7!!"+/78Nsb6i[2e
+s8VHds8W,W!!!P['FBj%U&Y/ns8W&us8W,W!!"[NMM(s0g40/'s8V]ks8W,G!!"*=W1]d`.KBGK
+s8B\4s8W,7!!#6Z6NKFPomd#Bs8W!&s8W+\!!#76'P[UJ=o\O&s8Qm@s8W,;!!#5[#%@jgon3;G
+s81RWs8W,7!!#g_d>YjAC*EZZs8TSgs8W+L!!",%#S@[Loh6M0s8V_)s8W+l!!%M\l;gH5>-Iu=
+s8U_2s8W+L!!%Mj,dkEZH:<>bs8R=gs8T8f!!!Q(ql1MXVjJTjs8VA/s8W+L!!%N;Y$[;[AO%@=
+s8W#ls8S^a!!#7ZpXD_HC:8s(s8V]cs8W*!!!#7\rRHdZg=-B1s8UgJs8QGW!!&)VQ_r[ZV'XN!
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+s8W,os8W*!!'l&69r-3(j][=)s8W,os8W&u!!$C+[d0>'r1fnes8VE[s8W'`!!#7`gN<'XRqO(.
+s8W,os8W*!!!'e6mFBA!p"9lYs8W,os8W+L!!%NK[Wm3>X"&jVs8W,os8W'`!!#7`hY+$>G.+%O
+s8W,os8W'$!!#7`f54QTg6"]<s8W,os8W&u!!#7`H?t#ElQcUcs8W,os8W!^!!*'!hS#CkGa;e@
+s8W,os8W'`!!*'![=;5Kerg"LrVuoms8W$?!!*'!mV]LHh+4ILs8W,o^]49u!!*'!n,$-eWegj+
+s8W,oJ`$5&!!*'!r-lA`ok7/ls8W,oM5U-%!!*'!q<h0^Xq?CAs8W,o!+#@2!!3-"s)kKJo;[l_
+s8W,o!&jTP!!3-"rI2I>qj84]s8W,o!/pZG!!3-"rn15Rs._h$s8W,o!#P2+!!E9$s*gtTs6("Y
+s8W,o!!2kf!!E9$rEE:"rmo0*s8W,o!!D`k!!E9$s85cus4&lNs8W,o!!;:*!!E9$s'M=(s7h+o
+VuQel!!Von!!E9$s*H(os6>L@&-)\)!!2m\!!E9$s5'6Ks,o,8_#OH0!!E$^!"],0s.ADfs6;!2
+!3cFt!"\c?!"],0s8Tf_s8%fU!)7t<!$D,h!$D7@s$'ljs8B_-!!.TE!"](i!$D7@s6oses8Rc/
+!!",9z!$D7@s8W-!s8RUt!!!,rz!'gM`s8W-!s8RU5!!!#oz!&jlWs8W-!s8S;[!!!/sz!!$C+
+s8W-!s8V]hJ,fhaz!!!!`s8W-!s8W,u:]L[Oz!!!!0s8W-!s8W,rs.BJhz!!!!#s8W-!s8W-!
+s8W,oTE"rlz5QCc`s8W-!h>Vm8huE`Wz!WW3"s8W,ts7^m@huE`Wz!<<)^s8W-!s8Vcm^]4?7
+z!<<*!s8K`^s8U";ci=%Gz!<<&us8A#YDsd<"J,fQLz!.k1Ls2YHFkPt#OJ,fQLz!!*%'^\@p2
+cb7*oJ,fQLz!!#6rs3LlJci6fA~>
+end
+grestore
+showpage
+%%Trailer
+%%Pages: 1
+%%EOF
diff --git a/test/refs/o-tiff2ps-PS3.ps b/test/refs/o-tiff2ps-PS3.ps
new file mode 100644
index 00000000..6ec22b9b
--- /dev/null
+++ b/test/refs/o-tiff2ps-PS3.ps
@@ -0,0 +1,104 @@
+%!PS-Adobe-3.0
+%%Creator: tiff2ps
+%%Title: miniswhite-1c-1b.tiff
+%%CreationDate: Tue Apr  2 16:33:00 2019
+%%DocumentData: Clean7Bit
+%%Origin: 0 0
+%%BoundingBox: 0 0 157 151
+%%LanguageLevel: 3
+%%Pages: (atend)
+%%EndComments
+%%BeginSetup
+gsave newpath clippath pathbbox grestore
+  4 2 roll 2 copy translate
+  exch 3 1 roll sub 3 1 roll sub exch
+  currentpagedevice /PageSize get aload pop
+  exch 3 1 roll div 3 1 roll div abs exch abs
+  2 copy gt { exch } if pop
+  dup 1 lt { dup scale } { pop } ifelse
+%%EndSetup
+%%Page: 1 1
+%%PageOrientation: Landscape
+%%PageBoundingBox: 0 0 157 151
+1 dict begin /PageSize [ 157.000000 151.000000 ] def currentdict end setpagedevice
+<<
+  /Policies <<
+    /PageSize 3
+  >>
+>> setpagedevice
+gsave
+100 dict begin
+157.000000 151.000000 scale
+% PostScript Level 2 only.
+/DeviceGray setcolorspace
+{ % exec
+ /im_stream currentfile /ASCII85Decode filter def
+ <<
+  /ImageType 1
+  /Width 157
+  /Height 151
+  /ImageMatrix [ 157 0 0 -151 0 151 ]
+  /BitsPerComponent 1
+  /Interpolate true
+  /Decode [1 0]
+  /DataSource im_stream
+ >> image
+ im_stream status { im_stream flushfile } if
+}
+exec
+rVPltoDejk!"Ju/3$7VQ!.UpIV-SSehuE`Xq.Ka.3#d/d!%<?t[o6KR-ia5Ps82is0EM0'!$=0#
+mf(r0"98E4gZ/>7!!%KK!"=AXeciN^#QOiDmG7gC:]MI8!"NB:J-Xp1#Qb#+^OO$!TE#<!!$6Xj
+!!3,oF?fR#pY'!TJ,fWN!"T&0J-#QIr'15Kh>cC5^]4?7!"PYE!!)c.r;XM.Iqrj&iW&rY!'Wgo
+!!)LAs8N&Uli6Yua8c2?!'Cem!!)+JqtpEnqYg:O5QCcq!'HKr!!2!Yo7(u]s(cQKj8]/[!.>"N
+!!C(<p\4^frVsQ5Du]k<!-ebL!!D-ZoDe9mJ%#+CfDkmO!-eME!!@`Qmsk?ZT'pUd^]4?7!Vh6H
+!!5CfbQ%JVp\k'g0E;(Q"8"!l!$;1Cs8W!<s5!^!L]@DT"8Muu^`9!LL]-F$fD!nsn,NFg#OnAd
+PWaO-^]3dfrr6:'qu?]s5PPQcTfiAtIGaZYJ%b`[?2ss*+8MQ0J3!]1n,K'Ls50Z]ec5[M+8dMe
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+TF;qBJ,a$YhVHntrh'5q5N#'4JI"L/qu6bFp](9NBA`b#LVO[UL]fs:s8ITLDu$C*]!q_l5Qh&e
+TI><gs8N?'qsXPls3(R#6sp#qjBqqjs83&hgKh8TYM'N2&-)_2!'gKJs1JsAH2%>_qS+\nzW5&<j
+s83(N_8!1S^?bf"5QCcaJcGXt^\eW8r;H?gl[Ss2&-)\1OT56&s7c]pr*R3DXjt2MzT`=r)s5aH7
+=*s?(i,eqk+92BA!!i!Xs6p9Fn%JDH!*B3rJ,fQL!!i#.s3(TEot.DH!-/&2z!!D^Ts1ehgB>)'a
+!+Fd[!!",I!!2Z*s82lSrSQ2a!+`k+z!!D.$m%sdWC#Ao_!*0'[!!!#W!!U6#_%?Zro\I"G!,o(:
+!!!(^!!hFXLJe*knc->M!.)ENJ,fcR!"\(EJ._i(FB@Xu!3bkd!!$l/!"[$R(^L*O^ja&V!W'S-
+!!#1_!"ZjI$4m1Jn6bn!X"<`9!!N'^!.Vcc+ohTRn/pti>5U&C!!(B=!<:#'+92BN^b,TcY#m(5
+!!0lcJ:GL&!!!!(E$'O9e_DhR!!.U8`kT:i5QCcn^`3%DJ+t\h!!*'"PR#!SJ,fQNi#hFb<R;9Q
+!!!A!\YnNj(]XOHGRseVs)9XiJ,gSiM?gpAKE(u_TF\g7TC>)=J,hP/L9J^T!!!!'n-/](q-\.>
+8,tP5iP32SKE(uVYRgWgs.KDkfEaS>iSWjg+92BHm^rJoBu#5uiZJ>rs8UZ75QCch]l!E?rrN0"
+s*t)7s8U2i'EA+<p6,J@CBNJohuEbMs8W)tTE"rsJ"%QFrW[lP^]4??s8W&t"onW6m.Kj2AIJP<
+J,fQLs8W,s:]LJ#qs4/Ceq3)b!!!!Qs8W,s!WW32s&O@`r@d@6!!!!)hp;?$5X5;Senb$kqHmn8
+!!!!)S,`Nd,ldoMs8Gh*hu!HR!!!!1LHkh<"98E4s5*M]hfo,#!!!!Y,ldoB+92BPrNg_Z^$l"$
+!!!!IVZ6\o#ljr9n+UQ%rkJ%(!!!!Y%0-A&!!!!0rP$>XiJ6>5+92C\PQ1[X&-)\@s8E-'ecWuh
+!!!"D\,ZL+!<<*As8IQOmNJ5FO8o:U0E;(I+92BPs87NPli:E(J,fRos8W,o!!!!0s6p*kh1,J1
+a8c4uhuE`G6i[2ts2"a:^&S-8huE`oYQ+Xl!!!!@rV?QqRt(JDkl:]C?iU0$+92B`OF+hES=fi^
+quQln^]4?'!!!!?9HW?r(''^%qV<n$^]4?'!!!!`5Yq:X2@Y0;r+FUUs8W,o#QOjR!"\Q!0u&ME
+qd86js8W,g!!!"E!!i@N"$`FYs8W,gs8W,g!!!"HJ-GEB#_)gSs8W,os8W,_5QCfR!!)Kg$2so)
+s8W,/s8W,g!!!#m+?4HC!'S[/s8W,os8W,o!!!#iU^n%;!-S>Bs8W,gs8W,g!!!#k!!e&TE:#mj
+s8W,Os8W,g!!!#g&-LPb!rAPis8Vuks8W,WJ,fSb8LOQ=LA1`Ls8W,gs8W,W!!!,;U:?:L,(KXn
+s8V!Gs8W,g!!!,Z!^[5(e,TIKs8W(ks8W,W!!!,ZBG(:UTE#N's8W,7s8W,g!!!8D!CWR_<'UEa
+s8VgYs8W,G!!!,<WB`uSTE"rls8REGs8W,W!!!8"+rUF^ec5[Ms8W*!s8W,7!!"+/78Nsb6i[2e
+s8VHds8W,W!!!P['FBj%U&Y/ns8W&us8W,W!!"[NMM(s0g40/'s8V]ks8W,G!!"*=W1]d`.KBGK
+s8B\4s8W,7!!#6Z6NKFPomd#Bs8W!&s8W+\!!#76'P[UJ=o\O&s8Qm@s8W,;!!#5[#%@jgon3;G
+s81RWs8W,7!!#g_d>YjAC*EZZs8TSgs8W+L!!",%#S@[Loh6M0s8V_)s8W+l!!%M\l;gH5>-Iu=
+s8U_2s8W+L!!%Mj,dkEZH:<>bs8R=gs8T8f!!!Q(ql1MXVjJTjs8VA/s8W+L!!%N;Y$[;[AO%@=
+s8W#ls8S^a!!#7ZpXD_HC:8s(s8V]cs8W*!!!#7\rRHdZg=-B1s8UgJs8QGW!!&)VQ_r[ZV'XN!
+s8W,os8W*a!!0k-`S4RmRZIM:s8Vq?s8W*!!!FDDH_mGAjXOgHs8V!Os8W+,!!",@ZeK:TWi6U=
+s8W,os8W*!!'l&69r-3(j][=)s8W,os8W&u!!$C+[d0>'r1fnes8VE[s8W'`!!#7`gN<'XRqO(.
+s8W,os8W*!!!'e6mFBA!p"9lYs8W,os8W+L!!%NK[Wm3>X"&jVs8W,os8W'`!!#7`hY+$>G.+%O
+s8W,os8W'$!!#7`f54QTg6"]<s8W,os8W&u!!#7`H?t#ElQcUcs8W,os8W!^!!*'!hS#CkGa;e@
+s8W,os8W'`!!*'![=;5Kerg"LrVuoms8W$?!!*'!mV]LHh+4ILs8W,o^]49u!!*'!n,$-eWegj+
+s8W,oJ`$5&!!*'!r-lA`ok7/ls8W,oM5U-%!!*'!q<h0^Xq?CAs8W,o!+#@2!!3-"s)kKJo;[l_
+s8W,o!&jTP!!3-"rI2I>qj84]s8W,o!/pZG!!3-"rn15Rs._h$s8W,o!#P2+!!E9$s*gtTs6("Y
+s8W,o!!2kf!!E9$rEE:"rmo0*s8W,o!!D`k!!E9$s85cus4&lNs8W,o!!;:*!!E9$s'M=(s7h+o
+VuQel!!Von!!E9$s*H(os6>L@&-)\)!!2m\!!E9$s5'6Ks,o,8_#OH0!!E$^!"],0s.ADfs6;!2
+!3cFt!"\c?!"],0s8Tf_s8%fU!)7t<!$D,h!$D7@s$'ljs8B_-!!.TE!"](i!$D7@s6oses8Rc/
+!!",9z!$D7@s8W-!s8RUt!!!,rz!'gM`s8W-!s8RU5!!!#oz!&jlWs8W-!s8S;[!!!/sz!!$C+
+s8W-!s8V]hJ,fhaz!!!!`s8W-!s8W,u:]L[Oz!!!!0s8W-!s8W,rs.BJhz!!!!#s8W-!s8W-!
+s8W,oTE"rlz5QCc`s8W-!h>Vm8huE`Wz!WW3"s8W,ts7^m@huE`Wz!<<)^s8W-!s8Vcm^]4?7
+z!<<*!s8K`^s8U";ci=%Gz!<<&us8A#YDsd<"J,fQLz!.k1Ls2YHFkPt#OJ,fQLz!!*%'^\@p2
+cb7*oJ,fQLz!!#6rs3LlJci6fA~>
+end
+grestore
+showpage
+%%Trailer
+%%Pages: 1
+%%EOF
diff --git a/test/tiff2ps-EPS1.sh b/test/tiff2ps-EPS1.sh
index ebe6f04b..b1dc82e7 100755
--- a/test/tiff2ps-EPS1.sh
+++ b/test/tiff2ps-EPS1.sh
@@ -2,5 +2,7 @@
 #
 # Basic sanity check for tiffps with PostScript Level 1 encapsulated output
 #
+PSFILE=o-tiff2ps-EPS1.ps
 . ${srcdir:-.}/common.sh
-f_test_stdout "${TIFF2PS} -e -1" "${IMG_MINISWHITE_1C_1B}" "o-tiff2ps-EPS1.ps"
\ No newline at end of file
+f_test_stdout "${TIFF2PS} -e -1" "${IMG_MINISWHITE_1C_1B}" "${PSFILE}"
+diff -I '%%\(CreationDate\|Title\):*' -u "${REFS}/${PSFILE}" "${PSFILE}" || exit 1
diff --git a/test/tiff2ps-PS1.sh b/test/tiff2ps-PS1.sh
index 65921597..73171b98 100755
--- a/test/tiff2ps-PS1.sh
+++ b/test/tiff2ps-PS1.sh
@@ -2,5 +2,7 @@
 #
 # Basic sanity check for tiffps with PostScript Level 1 output
 #
+PSFILE="o-tiff2ps-PS1.ps"
 . ${srcdir:-.}/common.sh
-f_test_stdout "${TIFF2PS} -a -p -1" "${IMG_MINISWHITE_1C_1B}" "o-tiff2ps-PS1.ps"
\ No newline at end of file
+f_test_stdout "${TIFF2PS} -a -p -1" "${IMG_MINISWHITE_1C_1B}" "${PSFILE}"
+diff -I '%%\(CreationDate\|Title\):*' -u "${REFS}/${PSFILE}" "${PSFILE}" || exit 1
diff --git a/test/tiff2ps-PS2.sh b/test/tiff2ps-PS2.sh
index 2a216069..9d3a521d 100755
--- a/test/tiff2ps-PS2.sh
+++ b/test/tiff2ps-PS2.sh
@@ -2,5 +2,7 @@
 #
 # Basic sanity check for tiffps with PostScript Level 2 output
 #
+PSFILE=o-tiff2ps-PS2.ps
 . ${srcdir:-.}/common.sh
-f_test_stdout "${TIFF2PS} -a -p -2" "${IMG_MINISWHITE_1C_1B}" "o-tiff2ps-PS2.ps"
\ No newline at end of file
+f_test_stdout "${TIFF2PS} -a -p -2" "${IMG_MINISWHITE_1C_1B}" "${PSFILE}"
+diff -I '%%\(CreationDate\|Title\):*' -u "${REFS}/${PSFILE}" "${PSFILE}" || exit 1
diff --git a/test/tiff2ps-PS3.sh b/test/tiff2ps-PS3.sh
index f9f34b66..eb55b9a0 100755
--- a/test/tiff2ps-PS3.sh
+++ b/test/tiff2ps-PS3.sh
@@ -2,5 +2,7 @@
 #
 # Basic sanity check for tiffps with PostScript Level 3 output
 #
+PSFILE=o-tiff2ps-PS3.ps
 . ${srcdir:-.}/common.sh
-f_test_stdout "${TIFF2PS} -a -p -3" "${IMG_MINISWHITE_1C_1B}" "o-tiff2ps-PS3.ps"
\ No newline at end of file
+f_test_stdout "${TIFF2PS} -a -p -3" "${IMG_MINISWHITE_1C_1B}" "${PSFILE}"
+diff -I '%%\(CreationDate\|Title\):*' -u "${REFS}/${PSFILE}" "${PSFILE}" || exit 1