diff --git a/tests/binary-cache.sh b/tests/binary-cache.sh
index dd8dae68..7365a550 100644
--- a/tests/binary-cache.sh
+++ b/tests/binary-cache.sh
@@ -16,9 +16,9 @@ basicTests() {
     clearStore
     clearCacheCache
 
-    nix-env --option binary-caches "file://$cacheDir" -f dependencies.nix -qas \* | grep -- "---"
+    nix-env --substituters "file://$cacheDir" -f dependencies.nix -qas \* | grep -- "---"
 
-    nix-store --option binary-caches "file://$cacheDir" --no-require-sigs -r $outPath
+    nix-store --substituters "file://$cacheDir" --no-require-sigs -r $outPath
 
     [ -x $outPath/program ]
 
@@ -28,13 +28,13 @@ basicTests() {
     clearCacheCache
     echo "WantMassQuery: 1" >> $cacheDir/nix-cache-info
 
-    nix-env --option binary-caches "file://$cacheDir" -f dependencies.nix -qas \* | grep -- "--S"
-    nix-env --option binary-caches "file://$cacheDir" -f dependencies.nix -qas \* | grep -- "--S"
+    nix-env --substituters "file://$cacheDir" -f dependencies.nix -qas \* | grep -- "--S"
+    nix-env --substituters "file://$cacheDir" -f dependencies.nix -qas \* | grep -- "--S"
 
     x=$(nix-env -f dependencies.nix -qas \* --prebuilt-only)
     [ -z "$x" ]
 
-    nix-store --option binary-caches "file://$cacheDir" --no-require-sigs -r $outPath
+    nix-store --substituters "file://$cacheDir" --no-require-sigs -r $outPath
 
     nix-store --check-validity $outPath
     nix-store -qR $outPath | grep input-2
@@ -63,7 +63,7 @@ mv $nar $nar.good
 mkdir -p $TEST_ROOT/empty
 nix-store --dump $TEST_ROOT/empty | xz > $nar
 
-nix-build --option binary-caches "file://$cacheDir" --no-require-sigs dependencies.nix -o $TEST_ROOT/result 2>&1 | tee $TEST_ROOT/log
+nix-build --substituters "file://$cacheDir" --no-require-sigs dependencies.nix -o $TEST_ROOT/result 2>&1 | tee $TEST_ROOT/log
 grep -q "hash mismatch" $TEST_ROOT/log
 
 mv $nar.good $nar
@@ -73,7 +73,7 @@ mv $nar.good $nar
 clearStore
 clearCacheCache
 
-if nix-store --option binary-caches "file://$cacheDir" -r $outPath; then
+if nix-store --substituters "file://$cacheDir" -r $outPath; then
     echo "unsigned binary cache incorrectly accepted"
     exit 1
 fi
@@ -83,12 +83,12 @@ fi
 # corresponding NAR has disappeared.
 clearStore
 
-nix-build --option binary-caches "file://$cacheDir" dependencies.nix --dry-run # get info
+nix-build --substituters "file://$cacheDir" dependencies.nix --dry-run # get info
 
 mkdir $cacheDir/tmp
 mv $cacheDir/*.nar* $cacheDir/tmp/
 
-NIX_DEBUG_SUBST=1 nix-build --option binary-caches "file://$cacheDir" dependencies.nix -o $TEST_ROOT/result --fallback
+NIX_DEBUG_SUBST=1 nix-build --substituters "file://$cacheDir" dependencies.nix -o $TEST_ROOT/result --fallback
 
 mv $cacheDir/tmp/* $cacheDir/
 
@@ -99,7 +99,7 @@ clearStore
 
 rm $(grep -l "StorePath:.*dependencies-input-2" $cacheDir/*.narinfo)
 
-nix-build --option binary-caches "file://$cacheDir" --no-require-sigs dependencies.nix -o $TEST_ROOT/result 2>&1 | tee $TEST_ROOT/log
+nix-build --substituters "file://$cacheDir" --no-require-sigs dependencies.nix -o $TEST_ROOT/result 2>&1 | tee $TEST_ROOT/log
 grep -q "copying path" $TEST_ROOT/log
 
 
@@ -124,18 +124,18 @@ nix copy --to file://$cacheDir?secret-key=$TEST_ROOT/sk1 $outPath
 clearStore
 clearCacheCache
 
-(! nix-store -r $outPath --option binary-caches "file://$cacheDir")
+(! nix-store -r $outPath --substituters "file://$cacheDir")
 
 
 # And it should fail if we provide an incorrect key.
 clearStore
 clearCacheCache
 
-(! nix-store -r $outPath --option binary-caches "file://$cacheDir" --option trusted-public-keys "$badKey")
+(! nix-store -r $outPath --substituters "file://$cacheDir" --trusted-public-keys "$badKey")
 
 
 # It should succeed if we provide the correct key.
-nix-store -r $outPath --option binary-caches "file://$cacheDir" --option trusted-public-keys "$otherKey $publicKey"
+nix-store -r $outPath --substituters "file://$cacheDir" --trusted-public-keys "$otherKey $publicKey"
 
 
 # It should fail if we corrupt the .narinfo.
@@ -152,10 +152,10 @@ done
 
 clearCacheCache
 
-(! nix-store -r $outPath --option binary-caches "file://$cacheDir2" --option trusted-public-keys "$publicKey")
+(! nix-store -r $outPath --substituters "file://$cacheDir2" --trusted-public-keys "$publicKey")
 
 # If we provide a bad and a good binary cache, it should succeed.
 
-nix-store -r $outPath --option binary-caches "file://$cacheDir2 file://$cacheDir" --option trusted-public-keys "$publicKey"
+nix-store -r $outPath --substituters "file://$cacheDir2 file://$cacheDir" --trusted-public-keys "$publicKey"
 
 fi # HAVE_LIBSODIUM
diff --git a/tests/fetchurl.sh b/tests/fetchurl.sh
index 7f2de907..9bbf044f 100644
--- a/tests/fetchurl.sh
+++ b/tests/fetchurl.sh
@@ -5,7 +5,7 @@ clearStore
 # Test fetching a flat file.
 hash=$(nix-hash --flat --type sha256 ./fetchurl.sh)
 
-outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha256 $hash --no-out-link --option hashed-mirrors '')
+outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha256 $hash --no-out-link --hashed-mirrors '')
 
 cmp $outPath fetchurl.sh
 
@@ -14,7 +14,7 @@ clearStore
 
 hash=$(nix hash-file --type sha512 --base64 ./fetchurl.sh)
 
-outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha512 $hash --no-out-link --option hashed-mirrors '')
+outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha512 $hash --no-out-link --hashed-mirrors '')
 
 cmp $outPath fetchurl.sh
 
@@ -29,7 +29,7 @@ rm -rf $mirror
 mkdir -p $mirror/sha512
 ln -s $(pwd)/fetchurl.sh $mirror/sha512/$hash32
 
-outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file:///no-such-dir/fetchurl.sh --argstr sha512 $hash --no-out-link --option hashed-mirrors "file://$mirror")
+outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file:///no-such-dir/fetchurl.sh --argstr sha512 $hash --no-out-link --hashed-mirrors "file://$mirror")
 
 # Test unpacking a NAR.
 rm -rf $TEST_ROOT/archive
diff --git a/tests/linux-sandbox.sh b/tests/linux-sandbox.sh
index 0691c30b..4a686bb5 100644
--- a/tests/linux-sandbox.sh
+++ b/tests/linux-sandbox.sh
@@ -16,7 +16,7 @@ rm -rf $TEST_ROOT/store0
 export NIX_STORE_DIR=/my/store
 export NIX_REMOTE=$TEST_ROOT/store0
 
-outPath=$(nix-build dependencies.nix --no-out-link --option sandbox-paths /nix/store)
+outPath=$(nix-build dependencies.nix --no-out-link --sandbox-paths /nix/store)
 
 [[ $outPath =~ /my/store/.*-dependencies ]]
 
diff --git a/tests/logging.sh b/tests/logging.sh
index d3813653..c894ad3f 100644
--- a/tests/logging.sh
+++ b/tests/logging.sh
@@ -11,5 +11,5 @@ path=$(nix-build dependencies.nix --no-out-link)
 clearStore
 rm -rf $NIX_LOG_DIR
 (! nix-store -l $path)
-nix-build dependencies.nix --no-out-link --option compress-build-log true
+nix-build dependencies.nix --no-out-link --compress-build-log
 [ "$(nix-store -l $path)" = FOO ]
diff --git a/tests/multiple-outputs.sh b/tests/multiple-outputs.sh
index 47698b10..ced6d758 100644
--- a/tests/multiple-outputs.sh
+++ b/tests/multiple-outputs.sh
@@ -59,5 +59,5 @@ fi
 
 echo "collecting garbage..."
 rm $TEST_ROOT/result*
-nix-store --gc --option keep-derivations true --option keep-outputs true
+nix-store --gc --keep-derivations --keep-outputs
 nix-store --gc --print-roots
diff --git a/tests/optimise-store.sh b/tests/optimise-store.sh
index bd88662b..61e3df2f 100644
--- a/tests/optimise-store.sh
+++ b/tests/optimise-store.sh
@@ -2,8 +2,8 @@ source common.sh
 
 clearStore
 
-outPath1=$(echo 'with import ./config.nix; mkDerivation { name = "foo1"; builder = builtins.toFile "builder" "mkdir $out; echo hello > $out/foo"; }' | nix-build - --no-out-link --option auto-optimise-store true)
-outPath2=$(echo 'with import ./config.nix; mkDerivation { name = "foo2"; builder = builtins.toFile "builder" "mkdir $out; echo hello > $out/foo"; }' | nix-build - --no-out-link --option auto-optimise-store true)
+outPath1=$(echo 'with import ./config.nix; mkDerivation { name = "foo1"; builder = builtins.toFile "builder" "mkdir $out; echo hello > $out/foo"; }' | nix-build - --no-out-link --auto-optimise-store)
+outPath2=$(echo 'with import ./config.nix; mkDerivation { name = "foo2"; builder = builtins.toFile "builder" "mkdir $out; echo hello > $out/foo"; }' | nix-build - --no-out-link --auto-optimise-store)
 
 inode1="$(stat --format=%i $outPath1/foo)"
 inode2="$(stat --format=%i $outPath2/foo)"
diff --git a/tests/repair.sh b/tests/repair.sh
index 7f9f97fd..ec7ad5dc 100644
--- a/tests/repair.sh
+++ b/tests/repair.sh
@@ -51,7 +51,7 @@ nix copy --to file://$cacheDir $path
 chmod u+w $path2
 rm -rf $path2
 
-nix-store --verify --check-contents --repair --option binary-caches "file://$cacheDir" --no-require-sigs
+nix-store --verify --check-contents --repair --substituters "file://$cacheDir" --no-require-sigs
 
 if [ "$(nix-hash $path2)" != "$hash" -o -e $path2/bad ]; then
     echo "path not repaired properly" >&2
@@ -69,7 +69,7 @@ if nix-store --verify-path $path2; then
     exit 1
 fi
 
-nix-store --repair-path $path2 --option binary-caches "file://$cacheDir" --no-require-sigs
+nix-store --repair-path $path2 --substituters "file://$cacheDir" --no-require-sigs
 
 if [ "$(nix-hash $path2)" != "$hash" -o -e $path2/bad ]; then
     echo "path not repaired properly" >&2
diff --git a/tests/restricted.sh b/tests/restricted.sh
index a297847c..c063c869 100644
--- a/tests/restricted.sh
+++ b/tests/restricted.sh
@@ -2,19 +2,19 @@ source common.sh
 
 clearStore
 
-nix-instantiate --option restrict-eval true --eval -E '1 + 2'
-(! nix-instantiate --option restrict-eval true ./simple.nix)
-nix-instantiate --option restrict-eval true ./simple.nix -I src=.
-nix-instantiate --option restrict-eval true ./simple.nix -I src1=simple.nix -I src2=config.nix -I src3=./simple.builder.sh
+nix-instantiate --restrict-eval --eval -E '1 + 2'
+(! nix-instantiate --restrict-eval ./simple.nix)
+nix-instantiate --restrict-eval ./simple.nix -I src=.
+nix-instantiate --restrict-eval ./simple.nix -I src1=simple.nix -I src2=config.nix -I src3=./simple.builder.sh
 
-(! nix-instantiate --option restrict-eval true --eval -E 'builtins.readFile ./simple.nix')
-nix-instantiate --option restrict-eval true --eval -E 'builtins.readFile ./simple.nix' -I src=..
+(! nix-instantiate --restrict-eval --eval -E 'builtins.readFile ./simple.nix')
+nix-instantiate --restrict-eval --eval -E 'builtins.readFile ./simple.nix' -I src=..
 
-(! nix-instantiate --option restrict-eval true --eval -E 'builtins.readDir ../src/boost')
-nix-instantiate --option restrict-eval true --eval -E 'builtins.readDir ../src/boost' -I src=../src
+(! nix-instantiate --restrict-eval --eval -E 'builtins.readDir ../src/boost')
+nix-instantiate --restrict-eval --eval -E 'builtins.readDir ../src/boost' -I src=../src
 
-(! nix-instantiate --option restrict-eval true --eval -E 'let __nixPath = [ { prefix = "foo"; path = ./.; } ]; in <foo>')
-nix-instantiate --option restrict-eval true --eval -E 'let __nixPath = [ { prefix = "foo"; path = ./.; } ]; in <foo>' -I src=.
+(! nix-instantiate --restrict-eval --eval -E 'let __nixPath = [ { prefix = "foo"; path = ./.; } ]; in <foo>')
+nix-instantiate --restrict-eval --eval -E 'let __nixPath = [ { prefix = "foo"; path = ./.; } ]; in <foo>' -I src=.
 
 p=$(nix eval --raw "(builtins.fetchurl file://$(pwd)/restricted.sh)" --restrict-eval --allowed-uris "file://$(pwd)")
 cmp $p restricted.sh
diff --git a/tests/setuid.nix b/tests/setuid.nix
index 7a12b4fb..c982d9cf 100644
--- a/tests/setuid.nix
+++ b/tests/setuid.nix
@@ -20,7 +20,7 @@ makeTest {
       startAll;
 
       # Copying to /tmp should succeed.
-      $machine->succeed('nix-build --option sandbox false -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
+      $machine->succeed('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
         mkdir -p $out
         cp ${pkgs.coreutils}/bin/id /tmp/id
       ")\' ');
@@ -30,7 +30,7 @@ makeTest {
       $machine->succeed("rm /tmp/id");
 
       # Creating a setuid binary should fail.
-      $machine->fail('nix-build --option sandbox false -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
+      $machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
         mkdir -p $out
         cp ${pkgs.coreutils}/bin/id /tmp/id
         chmod 4755 /tmp/id
@@ -41,7 +41,7 @@ makeTest {
       $machine->succeed("rm /tmp/id");
 
       # Creating a setgid binary should fail.
-      $machine->fail('nix-build --option sandbox false -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
+      $machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
         mkdir -p $out
         cp ${pkgs.coreutils}/bin/id /tmp/id
         chmod 2755 /tmp/id
@@ -52,7 +52,7 @@ makeTest {
       $machine->succeed("rm /tmp/id");
 
       # The checks should also work on 32-bit binaries.
-      $machine->fail('nix-build --option sandbox false -E \'(with import <nixpkgs> { system = "i686-linux"; }; runCommand "foo" {} "
+      $machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> { system = "i686-linux"; }; runCommand "foo" {} "
         mkdir -p $out
         cp ${pkgs.coreutils}/bin/id /tmp/id
         chmod 2755 /tmp/id
@@ -63,7 +63,7 @@ makeTest {
       $machine->succeed("rm /tmp/id");
 
       # The tests above use fchmodat(). Test chmod() as well.
-      $machine->succeed('nix-build --option sandbox false -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
+      $machine->succeed('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
         mkdir -p $out
         cp ${pkgs.coreutils}/bin/id /tmp/id
         perl -e \"chmod 0666, qw(/tmp/id) or die\"
@@ -73,7 +73,7 @@ makeTest {
 
       $machine->succeed("rm /tmp/id");
 
-      $machine->fail('nix-build --option sandbox false -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
+      $machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
         mkdir -p $out
         cp ${pkgs.coreutils}/bin/id /tmp/id
         perl -e \"chmod 04755, qw(/tmp/id) or die\"
@@ -84,7 +84,7 @@ makeTest {
       $machine->succeed("rm /tmp/id");
 
       # And test fchmod().
-      $machine->succeed('nix-build --option sandbox false -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
+      $machine->succeed('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
         mkdir -p $out
         cp ${pkgs.coreutils}/bin/id /tmp/id
         perl -e \"my \\\$x; open \\\$x, qw(/tmp/id); chmod 01750, \\\$x or die\"
@@ -94,7 +94,7 @@ makeTest {
 
       $machine->succeed("rm /tmp/id");
 
-      $machine->fail('nix-build --option sandbox false -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
+      $machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
         mkdir -p $out
         cp ${pkgs.coreutils}/bin/id /tmp/id
         perl -e \"my \\\$x; open \\\$x, qw(/tmp/id); chmod 04777, \\\$x or die\"
diff --git a/tests/shell.shebang.sh b/tests/shell.shebang.sh
index a6c4bc94..c8e55ca9 100755
--- a/tests/shell.shebang.sh
+++ b/tests/shell.shebang.sh
@@ -1,4 +1,4 @@
 #! @ENV_PROG@ nix-shell
-#! nix-shell -I nixpkgs=shell.nix --option use-substitutes false
+#! nix-shell -I nixpkgs=shell.nix --no-use-substitutes
 #! nix-shell --pure -i bash -p foo bar
 echo "$(foo) $(bar) $@"
diff --git a/tests/timeout.sh b/tests/timeout.sh
index d3d85200..39ecf0a1 100644
--- a/tests/timeout.sh
+++ b/tests/timeout.sh
@@ -15,7 +15,7 @@ if ! echo "$messages" | grep -q "timed out"; then
     exit 1
 fi
 
-if nix-build -Q timeout.nix -A infiniteLoop --option max-build-log-size 100; then
+if nix-build -Q timeout.nix -A infiniteLoop --max-build-log-size 100; then
     echo "build should have failed"
     exit 1
 fi