diff --git a/scripts/ImportExportTest.sh b/scripts/ImportExportTest.sh
index d0f0c5a33..11ff97263 100755
--- a/scripts/ImportExportTest.sh
+++ b/scripts/ImportExportTest.sh
@@ -99,11 +99,13 @@ function testImportExportEquivalence {
                 UNCOMPILABLE=$((UNCOMPILABLE + 1))
                 return 0
             else
+                $SOLC --optimize --combined-json bin,bin-runtime,opcodes,asm,srcmap,srcmap-runtime --pretty-json "$nth_input_file" "${all_input_files[@]}" > expected_optimized.json 2> expected_optimized.error
                 for contract in $(jq '.contracts | keys | .[]' expected.json 2> /dev/null)
                 do
                     for type in "${types[@]}"
                     do
                         jq --raw-output ".contracts.${contract}.\"${type}\"" expected.json > "expected.${type}"
+                        jq --raw-output ".contracts.${contract}.\"${type}\"" expected_optimized.json > "expected_optimized.${type}"
                     done
 
                     assembly=$(cat expected.asm)
@@ -117,27 +119,47 @@ function testImportExportEquivalence {
                             FAILED=$((FAILED + 1))
                             return 0
                         else
+                            $SOLC --combined-json bin,bin-runtime,opcodes,asm,srcmap,srcmap-runtime --pretty-json --import-asm-json expected.asm > obtained_optimized.json 2> obtained_optimized.error
                             for type in "${types[@]}"
                             do
                                 for obtained_contract in $(jq '.contracts | keys | .[]' obtained.json  2> /dev/null)
                                 do
                                     jq --raw-output ".contracts.${obtained_contract}.\"${type}\"" obtained.json > "obtained.${type}"
+                                    jq --raw-output ".contracts.${obtained_contract}.\"${type}\"" obtained_optimized.json > "obtained_optimized.${type}"
                                     set +e
                                     DIFF="$(diff "expected.${type}" "obtained.${type}")"
+                                    # DIFF_OPTIMIZED="$(diff "expected_optimized.${type}" "obtained_optimized.${type}")"
                                     set -e
-                                    if [ "$DIFF" != "" ]
+                                    if [ "$DIFFVIEW" == "" ]
                                     then
-                                        if [ "$DIFFVIEW" == "" ]
+                                        if [ "$DIFF" != "" ]
                                         then
                                             echo -e "ERROR: JSONS differ for $1: \n $DIFF \n"
                                             echo "Expected:"
                                             cat  "expected.${type}"
                                             echo "Obtained:"
                                             cat "obtained.${type}"
-                                        else
-                                            # Use user supplied diff view binary
+                                        fi
+                                        if [ "$DIFF_OPTIMIZED" != "" ]
+                                        then
+                                            echo -e "ERROR: JSONS (optimized) differ for $1: \n $DIFF \n"
+                                            echo "Expected (optimized):"
+                                            cat  "expected_optimized.${type}"
+                                            echo "Obtained (optimized):"
+                                            cat "obtained_optimized.${type}"
+                                        fi
+                                    else
+                                        # Use user supplied diff view binary
+                                        if [ "$DIFF" != "" ]
+                                        then
+                                            echo "$DIFFVIEW expected.json obtained.json"
                                             $DIFFVIEW expected.json obtained.json
                                         fi
+                                        if [ "$DIFF_OPTIMIZED" != "" ]
+                                        then
+                                            echo "$DIFFVIEW expected_optimized.json obtained_optimized.json"
+                                            $DIFFVIEW expected_optimized.json obtained_optimized.json
+                                        fi
                                         _TESTED=
                                         FAILED=$((FAILED + 1))
                                         return 0