diff --git a/Buildscr b/Buildscr
index 69cb3213..e44762c2 100644
--- a/Buildscr
+++ b/Buildscr
@@ -160,12 +160,12 @@ in putty do convert -size 493x58 canvas:white \( icons/putty-48.png -geometry +4
 #
 # For the 32-bit ones, we set a subsystem version of 5.01, which
 # allows the resulting files to still run on Windows XP.
-in putty/windows with clangcl32 do mkdir build32 && Platform=x86 make -f Makefile.clangcl BUILDDIR=build32/ SUBSYSVER=,5.01 $(Makeargs) all cleantestprogs -j$(nproc)
-in putty/windows with clangcl64 do mkdir build64 && Platform=x64 make -f Makefile.clangcl BUILDDIR=build64/ $(Makeargs) all cleantestprogs -j$(nproc)
+in putty/windows with clangcl32 do mkdir build32 && Platform=x86 make -f Makefile.clangcl BUILDDIR=build32/ SUBSYSVER=,5.01 $(Makeargs) all -j$(nproc)
+in putty/windows with clangcl64 do mkdir build64 && Platform=x64 make -f Makefile.clangcl BUILDDIR=build64/ $(Makeargs) all -j$(nproc)
 
 # Build experimental Arm Windows binaries.
-in putty/windows with clangcl_a32 do mkdir abuild32 && Platform=arm make -f Makefile.clangcl BUILDDIR=abuild32/ SUBSYSVER=,5.01 $(Makeargs) all cleantestprogs -j$(nproc)
-in putty/windows with clangcl_a64 do mkdir abuild64 && Platform=arm64 make -f Makefile.clangcl BUILDDIR=abuild64/ $(Makeargs) all cleantestprogs -j$(nproc)
+in putty/windows with clangcl_a32 do mkdir abuild32 && Platform=arm make -f Makefile.clangcl BUILDDIR=abuild32/ SUBSYSVER=,5.01 $(Makeargs) all -j$(nproc)
+in putty/windows with clangcl_a64 do mkdir abuild64 && Platform=arm64 make -f Makefile.clangcl BUILDDIR=abuild64/ $(Makeargs) all -j$(nproc)
 
 # Build the 'old' binaries, which should still run on all 32-bit
 # versions of Windows back to Win95 (but not Win32s). These link
@@ -174,7 +174,16 @@ in putty/windows with clangcl_a64 do mkdir abuild64 && Platform=arm64 make -f Ma
 # a subsystem version of 4.0, and compile with /arch:IA32 to prevent
 # the use of modern CPU features like MMX which older machines also
 # might not have.
-in putty/windows with clangcl32_2003 do mkdir buildold && Platform=x86 make -f Makefile.clangcl BUILDDIR=buildold/ $(Makeargs) CCTARGET=i386-pc-windows-msvc13.0.0 SUBSYSVER=,4.0 EXTRA_windows=wincrt0.obj EXTRA_console=crt0.obj XFLAGS=/arch:IA32 all cleantestprogs -j$(nproc)
+in putty/windows with clangcl32_2003 do mkdir buildold && Platform=x86 make -f Makefile.clangcl BUILDDIR=buildold/ $(Makeargs) CCTARGET=i386-pc-windows-msvc13.0.0 SUBSYSVER=,4.0 EXTRA_windows=wincrt0.obj EXTRA_console=crt0.obj XFLAGS=/arch:IA32 all -j$(nproc)
+
+# Remove Windows binaries for the test programs we don't want to ship,
+# like testbn.exe. (But we still _built_ them, to ensure the build
+# worked.)
+in putty/windows do make -f Makefile.clangcl BUILDDIR=build32/ cleantestprogs
+in putty/windows do make -f Makefile.clangcl BUILDDIR=build64/ cleantestprogs
+in putty/windows do make -f Makefile.clangcl BUILDDIR=abuild32/ cleantestprogs
+in putty/windows do make -f Makefile.clangcl BUILDDIR=abuild64/ cleantestprogs
+in putty/windows do make -f Makefile.clangcl BUILDDIR=buildold/ cleantestprogs
 
 # Code-sign the Windows binaries, if the local bob config provides a
 # script to do so in a cross-compiling way. We assume here that the