diff --git a/scripts/common.sh b/scripts/common.sh
index 7cb96ed02..1ea0e1fc1 100644
--- a/scripts/common.sh
+++ b/scripts/common.sh
@@ -246,3 +246,12 @@ function first_word
 
     echo "$words" | cut -d " " -f 1
 }
+
+# Function reads from stdin. Therefore it has to be used with pipes.
+function split_on_empty_lines_into_numbered_files
+{
+    path_prefix="${1}"
+    path_suffix="${2}"
+
+    awk -v RS= "{print > (\"${path_prefix}_\"NR \"${path_suffix}\")}"
+}
diff --git a/test/cmdlineTests.sh b/test/cmdlineTests.sh
index 8b6f64630..91b233b89 100755
--- a/test/cmdlineTests.sh
+++ b/test/cmdlineTests.sh
@@ -310,6 +310,9 @@ function test_solc_assembly_output
 
 function test_via_ir_equivalence()
 {
+    SOLTMPDIR=$(mktemp -d)
+    pushd "$SOLTMPDIR"
+
     (( $# <= 2 )) || fail "This function accepts at most two arguments."
 
     if [[ $2 != --optimize ]] && [[ $2 != "" ]]
@@ -320,56 +323,54 @@ function test_via_ir_equivalence()
     local solidity_file="$1"
     local optimize_flag="$2"
 
-    filename=$(basename "$1" .sol)
+    output_file_prefix=$(basename "$1" .sol)
 
     local optimizer_flags=()
     [[ $optimize_flag == "" ]] || optimizer_flags+=("$optimize_flag")
-    [[ $optimize_flag == "" ]] || filename+="_optimize"
+    [[ $optimize_flag == "" ]] || output_file_prefix+="_optimize"
 
     msg_on_error --no-stderr "$SOLC" --ir-optimized --debug-info location "${optimizer_flags[@]}" "$solidity_file" |
-    sed '/^Optimized IR:$/d' |
-    awk -v RS= "{print > (\"${filename}_\"NR \".yul\")}"
+        sed '/^Optimized IR:$/d' |
+        split_on_empty_lines_into_numbered_files $output_file_prefix ".yul"
 
-    for yul_file in $(find . -name "$filename*.yul" | sort -V); do
+    for yul_file in $(find . -name "${output_file_prefix}*.yul" | sort -V); do
         msg_on_error --no-stderr "$SOLC" --strict-assembly --asm "${optimizer_flags[@]}" "$yul_file" |
-        sed '/^======= <stdin>/d' |
-        sed '/^Text representation:$/d' >> "${yul_file/.yul/.asm}"
+            sed '/^Text representation:$/d' > "${yul_file/.yul/.asm}"
     done
 
     local asm_output_two_stage asm_output_via_ir
-    for asm_file in $(find . -name "$filename*.asm" | sort -V); do
+    for asm_file in $(find . -name "${output_file_prefix}*.asm" | sort -V); do
         asm_output_two_stage+=$(sed '/^asm_output_two_stage:$/d' "$asm_file" | sed '/^=======/d')
     done
 
     asm_output_via_ir=$(
         msg_on_error --no-stderr "$SOLC" --via-ir --asm --debug-info location "${optimizer_flags[@]}" "$solidity_file" |
-        sed '/^======= <stdin>/d' |
-        sed '/^EVM assembly:$/d' |
-        sed '/^asm_output_via_ir/d' |
-        sed '/^=======/d'
+            sed '/^EVM assembly:$/d' |
+            sed '/^=======/d'
     )
 
     diff_values "$asm_output_two_stage" "$asm_output_via_ir" --ignore-space-change --ignore-blank-lines
 
     local bin_output_two_stage bin_output_via_ir
 
-    for yul_file in $(find . -name "$filename*.yul" | sort -V); do
+    for yul_file in $(find . -name "${output_file_prefix}*.yul" | sort -V); do
         bin_output_two_stage+=$(
 	    msg_on_error --no-stderr "$SOLC" --strict-assembly --bin "${optimizer_flags[@]}" "$yul_file" |
-            sed '/^======= <stdin>/d' |
-            sed '/^Binary representation:$/d' |
-            sed '/^=======/d'
+                sed '/^Binary representation:$/d' |
+                sed '/^=======/d'
         )
     done
 
     bin_output_via_ir=$(
         msg_on_error --no-stderr "$SOLC" --via-ir --bin "${optimizer_flags[@]}" "$solidity_file" |
-        sed '/^======= <stdin>/d' |
         sed '/^Binary:$/d' |
         sed '/^=======/d'
     )
 
     diff_values "$bin_output_two_stage" "$bin_output_via_ir" --ignore-space-change --ignore-blank-lines
+
+    popd
+    rm -r "$SOLTMPDIR"
 }
 
 ## RUN
@@ -598,10 +599,7 @@ printTask "Testing assemble, yul, strict-assembly and optimize..."
 )
 
 printTask "Testing the eqivalence of --via-ir and a two-stage compilation..."
-SOLTMPDIR=$(mktemp -d)
 (
-    cd "$SOLTMPDIR"
-
     externalContracts=(
         externalTests/solc-js/DAO/TokenCreation.sol
         libsolidity/semanticTests/externalContracts/_prbmath/PRBMathSD59x18.sol
@@ -631,7 +629,6 @@ SOLTMPDIR=$(mktemp -d)
         test_via_ir_equivalence "${REPO_ROOT}/test/${contractFile}" --optimize
     done
 )
-rm -r "$SOLTMPDIR"
 
 printTask "Testing standard input..."
 SOLTMPDIR=$(mktemp -d)