diff --git a/validphys2/src/validphys/eff_exponents.py b/validphys2/src/validphys/eff_exponents.py
index 37ed5afed2..7587045978 100644
--- a/validphys2/src/validphys/eff_exponents.py
+++ b/validphys2/src/validphys/eff_exponents.py
@@ -397,7 +397,9 @@ def effective_exponents_table_internal(
     'effective_exponents_table_internal', ('fitpdfandbasis',))
 fmt = lambda a: float(significant_digits(a, 4))
 
-def next_effective_exponents_yaml(fit: FitSpec, effective_exponents_table):
+next_fit_eff_exps_table = collect("next_effective_exponents_table", ("fitpdfandbasis",))
+
+def next_effective_exponents_yaml(fit: FitSpec, next_fit_eff_exps_table):
     """-Returns a table in yaml format called NextEffExps.yaml
        -Prints the yaml table in the report
     using `effective_exponents_table` this provider outputs the yaml runcard to run
@@ -412,8 +414,8 @@ def next_effective_exponents_yaml(fit: FitSpec, effective_exponents_table):
 
     """
 
-    df_effexps = effective_exponents_table[0]
-    #Reading from the filter
+    df_effexps = next_fit_eff_exps_table[0]
+    # Use round trip loader rather than safe_load in fit.as_input()
     with open(fit.path/'filter.yml', 'r') as f:
         filtermap = yaml.load(f, yaml.RoundTripLoader)
     previous_exponents = filtermap['fitting']['basis']
@@ -425,8 +427,8 @@ def next_effective_exponents_yaml(fit: FitSpec, effective_exponents_table):
     runcard_flavours = basis.to_known_elements(
         [ref_fl['fl'] for ref_fl in previous_exponents]).tolist()
     for fl in flavours:
-        alphas = df_effexps.loc[(f'${fl}$', r'$\alpha$'), ['next Min', 'next Max']].values
-        betas = df_effexps.loc[(f'${fl}$', r'$\beta$'), ['next Min', 'next Max']].values
+        alphas = df_effexps.loc[(f'${fl}$', r'$\alpha$')].values
+        betas = df_effexps.loc[(f'${fl}$', r'$\beta$')].values
         previous_exponents[runcard_flavours.index(fl)]['smallx'] = [fmt(alpha) for alpha in alphas]
         previous_exponents[runcard_flavours.index(fl)]['largex'] = [fmt(beta) for beta in betas]
     #iterate t0
diff --git a/validphys2/src/validphys/tests/test_effexponents.py b/validphys2/src/validphys/tests/test_effexponents.py
new file mode 100644
index 0000000000..4703a2aa91
--- /dev/null
+++ b/validphys2/src/validphys/tests/test_effexponents.py
@@ -0,0 +1,20 @@
+import pytest
+
+from validphys.api import API
+from validphys.loader import FallbackLoader as Loader
+
+from reportengine.compat import yaml
+
+
+def test_next_runcard():
+    l = Loader()
+    ite1_fit = l.check_fit("191015-mw-001")
+    # The runcard of a 2nd iteration fit I ran manually
+    ite2_runcard = l.check_fit("191015-mw-001_ite2_for_testing").as_input()
+    ite2_runcard.pop("pdf")  # Removing the PDF key, it's an artefact of as_input
+
+    predicted_ite2_runcard = yaml.safe_load(
+        API.next_effective_exponents_yaml(fit="191015-mw-001")
+    )
+    # Check that the actual ite2 runcard matches what vp thinks it should be
+    assert predicted_ite2_runcard == ite2_runcard