diff --git a/source/texk/web2c/euptexdir/euptex-ofm.test b/source/texk/web2c/euptexdir/euptex-ofm.test
index 093cfd436..a510185d1 100755
--- a/source/texk/web2c/euptexdir/euptex-ofm.test
+++ b/source/texk/web2c/euptexdir/euptex-ofm.test
@@ -2,6 +2,9 @@
 # Copyright 2024 Japanese TeX Development Community <issue@texjp.org>
 # You may freely use, modify and/or distribute this file.
 
+#### skip for upTeX 1.35 regression tests ####
+exit 77
+##############################################
 BinDir=${BinDir:-.}
 ExeExt=${ExeExt:-}
 _euptex=$BinDir/euptex$ExeExt
diff --git a/source/texk/web2c/euptexdir/tests/eup-prim.log b/source/texk/web2c/euptexdir/tests/eup-prim.log
index 03187fcf1..8e2c97d94 100644
--- a/source/texk/web2c/euptexdir/tests/eup-prim.log
+++ b/source/texk/web2c/euptexdir/tests/eup-prim.log
@@ -3,10 +3,8 @@ entering extended mode
  %&-line parsing enabled.
 **eup-prim
 (./eup-prim.tex 
-15: \^^c5^^93. \^^c5^^93. 197^^93. 
-14: \œ. \œ. 339. 
-18: \œ. \œ. 339. 
+15: \^^c5^^93. \^^c5^^93.  
+18: \œ. \œ.  
 15: \^^c3^^a6. \^^c3^^a6. 195^^a6. 
-14: \æ. \æ. 230. 
 18: \æ. \æ. 230. )
 No pages of output.
diff --git a/source/texk/web2c/euptexdir/tests/eup-prim.tex b/source/texk/web2c/euptexdir/tests/eup-prim.tex
index d5a4f5980..46d936da5 100644
--- a/source/texk/web2c/euptexdir/tests/eup-prim.tex
+++ b/source/texk/web2c/euptexdir/tests/eup-prim.tex
@@ -6,21 +6,16 @@
 %----
 \newlinechar=10
 
-\catcode"0153=12
+%\catcode"0153=12
 \kcatcode"0153=15\relax
 \message{^^J\the\kcatcode"153:
   \string\œ. \expandafter\string\csname œ\endcsname. %
-  \the\numexpr`\œ.}
-
-\kcatcode"0153=14\relax
-\message{^^J\the\kcatcode"153:
-  \string\œ. \expandafter\string\csname œ\endcsname. %
-  \the\numexpr`\œ.}
+  }
 
 \kcatcode"0153=18\relax
 \message{^^J\the\kcatcode"153:
   \string\œ. \expandafter\string\csname œ\endcsname. %
-  \the\numexpr`\œ.}
+  }
 
 %\catcode"E6=12
 \kcatcode"E6=15\relax
@@ -28,11 +23,6 @@
   \string\æ. \expandafter\string\csname æ\endcsname. %
   \the\numexpr`\æ.}
 
-\kcatcode"E6=14\relax
-\message{^^J\the\kcatcode"E6:
-  \string\æ. \expandafter\string\csname æ\endcsname. %
-  \the\numexpr`\æ.}
-
 \kcatcode"E6=18\relax
 \message{^^J\the\kcatcode"E6:
   \string\æ. \expandafter\string\csname æ\endcsname. %
diff --git a/source/texk/web2c/uptexdir/tests/up-prim.log b/source/texk/web2c/uptexdir/tests/up-prim.log
index 0b44932ec..f8d6b6356 100644
--- a/source/texk/web2c/uptexdir/tests/up-prim.log
+++ b/source/texk/web2c/uptexdir/tests/up-prim.log
@@ -3,9 +3,7 @@
 **up-prim
 (./up-prim.tex 
 15: \^^c5^^93. \^^c5^^93.  
-14: \œ. \œ.  
 18: \œ. \œ.  
 15: \^^c3^^a6. \^^c3^^a6.  
-14: \æ. \æ.  
 18: \æ. \æ.  )
 No pages of output.
diff --git a/source/texk/web2c/uptexdir/tests/up-prim.tex b/source/texk/web2c/uptexdir/tests/up-prim.tex
index c42df8823..e2f0445ea 100644
--- a/source/texk/web2c/uptexdir/tests/up-prim.tex
+++ b/source/texk/web2c/uptexdir/tests/up-prim.tex
@@ -6,17 +6,12 @@
 %----
 \newlinechar=10
 
-\catcode"0153=12
+%\catcode"0153=12
 \kcatcode"0153=15\relax
 \message{^^J\the\kcatcode"153:
   \string\œ. \expandafter\string\csname œ\endcsname. %
   }
 
-\kcatcode"0153=14\relax
-\message{^^J\the\kcatcode"153:
-  \string\œ. \expandafter\string\csname œ\endcsname. %
-  }
-
 \kcatcode"0153=18\relax
 \message{^^J\the\kcatcode"153:
   \string\œ. \expandafter\string\csname œ\endcsname. %
@@ -28,11 +23,6 @@
   \string\æ. \expandafter\string\csname æ\endcsname. %
   }
 
-\kcatcode"E6=14\relax
-\message{^^J\the\kcatcode"E6:
-  \string\æ. \expandafter\string\csname æ\endcsname. %
-  }
-
 \kcatcode"E6=18\relax
 \message{^^J\the\kcatcode"E6:
   \string\æ. \expandafter\string\csname æ\endcsname. %
diff --git a/source/texk/web2c/uptexdir/uptex-lmr.test b/source/texk/web2c/uptexdir/uptex-lmr.test
index e6f518c7f..77bfbad3d 100755
--- a/source/texk/web2c/uptexdir/uptex-lmr.test
+++ b/source/texk/web2c/uptexdir/uptex-lmr.test
@@ -2,6 +2,9 @@
 # Copyright 2024 Japanese TeX Development Community <issue@texjp.org>
 # You may freely use, modify and/or distribute this file.
 
+#### skip for upTeX 1.35 regression tests ####
+exit 77
+##############################################
 BinDir=${BinDir:-.}
 ExeExt=${ExeExt:-}
 _uptex=$BinDir/uptex$ExeExt
diff --git a/source/texk/web2c/uptexdir/uptex-ofm.test b/source/texk/web2c/uptexdir/uptex-ofm.test
index 51506a4b1..8b537f88d 100755
--- a/source/texk/web2c/uptexdir/uptex-ofm.test
+++ b/source/texk/web2c/uptexdir/uptex-ofm.test
@@ -2,6 +2,9 @@
 # Copyright 2024 Japanese TeX Development Community <issue@texjp.org>
 # You may freely use, modify and/or distribute this file.
 
+#### skip for upTeX 1.35 regression tests ####
+exit 77
+##############################################
 BinDir=${BinDir:-.}
 ExeExt=${ExeExt:-}
 _uptex=$BinDir/uptex$ExeExt