diff --git a/src/test/regress/GNUmakefile b/src/test/regress/GNUmakefile
index 3d6a939..865351a 100644
--- a/src/test/regress/GNUmakefile
+++ b/src/test/regress/GNUmakefile
@@ -122,7 +122,7 @@ all-spi:
 ##
 
 check: all
-	$(SHELL) ./pg_regress --temp-install --top-builddir=$(top_builddir) --temp-port=$(TEMP_PORT) --schedule=$(srcdir)/parallel_schedule --multibyte=$(MULTIBYTE) $(MAXCONNOPT)
+	clientbindir="/usr/lib/postgresql-${SLOT}/bin/" $(SHELL) ./pg_regress --temp-install --top-builddir=$(top_builddir) --temp-port=$(TEMP_PORT) --schedule=$(srcdir)/parallel_schedule --multibyte=$(MULTIBYTE) $(MAXCONNOPT)
 
 installcheck: all
 	$(SHELL) ./pg_regress --schedule=$(srcdir)/serial_schedule --multibyte=$(MULTIBYTE)
diff --git a/src/test/regress/pg_regress.sh b/src/test/regress/pg_regress.sh
index 47f2cb9..130c671 100644
--- a/src/test/regress/pg_regress.sh
+++ b/src/test/regress/pg_regress.sh
@@ -80,6 +80,8 @@ host_platform='@host_tuple@'
 enable_shared='@enable_shared@'
 GCC=@GCC@
 
+test -z "${clientbindir}" && clientbindir="${bindir}"
+
 if [ "$GCC" = yes ]; then
     compiler=gcc
 else
@@ -409,7 +411,7 @@ then
     # wait forever, however.
     i=0
     max=60
-    until "$bindir/psql" $psql_options template1 </dev/null 2>/dev/null
+    until "$clientbindir/psql" $psql_options template1 </dev/null 2>/dev/null
     do
         i=`expr $i + 1`
         if [ $i -ge $max ]
@@ -457,7 +459,7 @@ else # not temp-install
         echo "(using postmaster on Unix socket, $port_info)"
     fi
     message "dropping database \"$dbname\""
-    "$bindir/dropdb" $psql_options "$dbname"
+    "$clientbindir/dropdb" $psql_options "$dbname"
     # errors can be ignored
 fi
 
@@ -466,7 +468,7 @@ fi
 # Set up SQL shell for the test.
 # ----------
 
-PSQL="$bindir/psql -a -q -X $psql_options"
+PSQL="$clientbindir/psql -a -q -X $psql_options"
 
 
 # ----------
@@ -497,13 +499,13 @@ fi
 # ----------
 
 message "creating database \"$dbname\""
-"$bindir/createdb" $encoding_opt $psql_options --template template0 "$dbname"
+"$clientbindir/createdb" $encoding_opt $psql_options --template template0 "$dbname"
 if [ $? -ne 0 ]; then
     echo "$me: createdb failed"
     (exit 2); exit
 fi
 
-"$bindir/psql" $psql_options -c "\
+"$clientbindir/psql" $psql_options -c "\
 alter database \"$dbname\" set lc_messages to 'C';
 alter database \"$dbname\" set lc_monetary to 'C';
 alter database \"$dbname\" set lc_numeric to 'C';
@@ -519,7 +521,7 @@ fi
 # ----------
 
 message "dropping regression test user accounts"
-"$bindir/psql" $psql_options -c 'DROP GROUP regressgroup1; DROP GROUP regressgroup2; DROP USER regressuser1, regressuser2, regressuser3, regressuser4;' $dbname 2>/dev/null
+"$clientbindir/psql" $psql_options -c 'DROP GROUP regressgroup1; DROP GROUP regressgroup2; DROP USER regressuser1, regressuser2, regressuser3, regressuser4;' $dbname 2>/dev/null
 if [ $? -eq 2 ]; then
     echo "$me: could not drop user accounts"
     (exit 2); exit
@@ -532,7 +534,7 @@ fi
 
 if [ "$enable_shared" = yes ]; then
         message "installing PL/pgSQL"
-        "$bindir/createlang" -L "$pkglibdir" $psql_options plpgsql $dbname
+        "$clientbindir/createlang" -L "$pkglibdir" $psql_options plpgsql $dbname
         if [ $? -ne 0 ] && [ $? -ne 2 ]; then
             echo "$me: createlang failed"
             (exit 2); exit